Question about Bosch 36 in. NGT 935 Gas Cooktop

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Stains from cleaning products?

My cleaning lady used Easy Off on the stainless surface (the can states OK for stainless surfaces). However, she left the spray sit on the stainless surface for a while and now the Hob top is stained in many places. Looks like the finish was taken off and now there are dark stains all over the surface. I've tried other SS cleaners and even white vinegar, but nothing seems to make the stains go away. Is there any fix for this or do I have to consider replacing the Hob top?

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Re: Stains from cleaning products?

Bosch (BSH appliance care) do a stainless steel conditioner you could try. I think its called Starglanz.

Posted on Mar 29, 2008

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Fix scratches on stainless steel appliance

The professionals in order to remove the scratches from st. steel they use special metal wire meshes like soft scotch bride attached on special rotary milling machine. They brush it in the direction of the grooves on the st. steel surface. They start with a hard brush and they reduce the strength until they finalise it as the original finish. If it a brush surface this is more easy than a polished mirror surface. These procedure need experience and care so you will not end up with more damage than the original one.

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Proper Use and Care of Ceramic Glass Cooktops

Here's some helpful tips that can hopefully ensure many years of quality use of your ceramic glass cook-top.

NOTE: It is important to maintain PROPER care of your ceramic glass cook top as they can be very expensive to replace. Prices vary between models, but most are in the $200 to $300 range. With added labor charges, this repair can cost over $600 from an appliance repair company.

WARRANTIES: Most manufacturer warranties DO NOT cover cosmetics. That is, if your cook-top paint starts to wear off from normal use, or from the selection of cookware you choose to use, manufacturers typically WILL NOT replace it. Warranties also DO NOT cover accidents such as dropping something on the top and chipping or breaking it. Some warranties WILL cover, however, blistering, warping and heat related breakage that were no fault of the consumer (as long as you were using the recommended cookware). It is important to become familiar with, and follow, all the manufacturer's use and care instructions that come with your range.


It is normal for the ceramic glass to change color when heated. This is especially true for lighter colored surfaces. The color should return to normal when cooled. It is also normal for the enameled or painted areas on the cook top to show signs of wear and fade over time. Proper cleaning and cookware selection can extend the cook top appearance.

It is NORMAL for the radiant heat surface elements to glow red and cycle on and off. There is a thermostat associated with each individual element that regulates the temperature. The frequency at which the elements cycle on and off is determined by the heat setting.


Use ONLY flat bottomed cookware for the best results of heat transfer from the surface elements. Cookware with warped, rounded or ribbed bottoms can cause uneven heat transfer which can result in uneven heating of the cooking surface and cause damage to the cook-top such as cracking and/or permanent surface discoloration.

An easy test you can use to determine the flatness of your cookware, is to turn the cookware upside down and place a ruler across the surface. As you rotate the ruler around the surface perimeter, you should not see any light along the ruler edge where it meets the surface. Cookware with slight indentions or expansion grooves can still be used, however.

Make sure the cookware bottom is always clean and dry before use to prevent any foreign matter from burning to the cook-top surface and leaving stains. ALWAYS place your cookware on the cook-top surface BEFORE turning the surface elements on.

Make sure the selected cookware matches the size surface element in use. The cookware surface should NOT exceed one inch beyond the radiant surface element surface.


The material of the cookware you select will determine how well it transfers heat and how evenly it cooks. The ideal cookware should be of medium to heavy thickness.

NOTE: A non-stick surface will take on the characteristics on the base metal used. (i.e., non-stick over aluminum, will take on the heating characteristics of aluminum).

*ALUMINUM - Heats quickly and evenly, light weight, suitable for all types of cooking tasks.

*COPPER - Heats quickly and evenly, light weight, suitable for all types of cooking tasks.

*Both aluminum and copper are great when used as a core metal cover with a non-stick or enamel surface. However, when used as a base metal, alone, they can leave metal transfer marks on the cook-top surface which will have to be cleaned immediately following use.

GLASS or CERAMIC - Heats slowly and unevenly, may scratch cook-top surface if there are any rough edges, best results are when using low or medium heat settings.

CAST IRON - Heats slowly and evenly, maintains heat for slow cooking, great for browning and frying, rough on cook-top surfaces, may scratch.

STAINLESS STEEL - Heats quickly and unevenly, a base or core of aluminum or copper can provide more even heating.

DO's and DON''T's:

DO NOT store heavy items, such as jars, cans, pots and pans above the cook-top surface. Any inadvertent dropping on the cook-top surface and cause cracks or shattering.

DO NOT lay hot lids on the cook-top surface. Heated air can become trapped under the lid creating a hot spot as the rest of the cook-top surface cools. The cook-top surface could potentially crack when the lid is removed.

DO NOT slide cookware across the cook-top surface. LIFT cookware as much as possible when moving from surface to surface. This will minimize metal transfer marks and scratching.

DO NOT cook popcorn in prepackaged aluminum containers. The aluminum could potentially melt and may not be able to be removed from the cook-top surface.

DO NOT store anything on the cook-top surface that could melt (such as plastic and aluminum foil). Once melted to the surface, some of these substances may not be able to be removed.

DO NOT store empty pots and pans on the cook-top surface.

DO NOT attempt to use the cook-top surface while the oven is on a self-cleaning cycle. The oven super heats to temperatures in excess of 500 degrees and causes radiant heat to be exhausted from the oven vent on the stove surface.

DO NOT use a cook-top that is cracked. Any spill overs could potentially leak into the radiant heat elements and create an electrical hazard.

DO clean up any spills from the cook-top surface that contains milk or sugar. You may allow the cook-top surface to cool in order to safely clean, but do not allow these substances to remain on the cook-top for extended periods. If not removed, these substances can cause permanent discoloration and stains.

DO wipe down the cook-top prior to, and immediately following use, to maintain the surface appearance.

DO NOT attempt to cook any foods directly on the cook-top surface without a pan!


Clean all spills and boil overs immediately.

Any substances that become adhered to cook-top surface can be removed by wiping up excess with hot soapy water and a kitchen sponge.

Use a non-abrasive pad (the green kitchen pads are considered non-abrasive) and a straight edge razor blade, pushing in one direction to remove stubborn particles.

Some metal transfer marks (copper and aluminum) may be removed by simply wiping cook-top surface with a damp sponge. Any remaining marks can often be removed with an approved cook-top cleaner.

Use only approved, non-abrasive cook top cleaner to keep the surface clean and polished.

DO NOT use scouring pads that will dull or damage cook top surface (i.e., steel wool or SOS pads).

DO NOT use any harsh chemicals such as ammonia or bleach that can etch or dull cook-top surface.

on Apr 19, 2011 | Cooktops

2 Answers

How do I clean my new electric Jenn-air cooktop with its glass top? Do I need a special cleaner for the glass?

  • Step 1 Wipe up spills as soon as they happen with a clean dry towel. According to the Jenn-Air website, for glass top cooking surfaces, you should do this even if it is hot since it will be harder to clean up later. Be careful not to get burned.
  • Step 2 Use a cooktop cleaner once it is cool. You can also use dishwashing detergent and water or just a baking soda paste (made with water).
  • Step 3 Apply the cleaner to a sponge, cloth or paper towel. For more stubborn stains, you can use a non-abrasive or "scratchless" pad.
  • Step 4 Rub the soiled areas until clean. Rinse well, especially if you used the baking soda paste as that can leave a residue.
  • Step 5 Use a razor blade for burned on and crusty stains that will not come off using the previous methods. Jenn-Air states to hold it at a 30-degree angle to carefully remove the stain.

  • Or you can use this on the link below.

    Good Luck and please rate 4 thumbs up for the free answer

    Jun 25, 2010 | Jenn-Air 30 in. CCE3401 Electric Cooktop

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    Have a kitchenaid gas cook top with the flat cooking surface in the middle for griddling. But its all dark brown and discolored especially around the back. I cant see to get it clean or get the brown...

    A few cycles in the dishwasher may help. Oven cleaner on the surfaces (pre warmed if possible). Please do NOT use anything abrasive (no metal scrubs, no steel wool, etc.). Ceramic surface cleaner (Ceramibright?) can be used safely.

    Oct 12, 2009 | Cooktops

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    Horribe stains left on whirlpool gas hob by domestic cleaner

    We Use Debruce Polish on all our cooktops. Debruce also works on stainless steel and polished granite, marble, porcelain, formica and glass. DeBruce is non-toxic odor-less and eco-friendly. You can get DeBruce on line at

    This stuff will do the job!!

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    Trying to remove stains around the gas unit where temp is the hottest.

    have you tried cooktop cleaner? this seams to work pretty good at getting stains out of stainless steal. (You know...cooktop cleaner is really just car wax if you had some try this on a little area and see how it works and if you like the results...there you go.) let me know what you think. But like i said always do a test point before doing the whole surface.

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    I used Mr. Clean multi-surface and the green, back side of the sponge. Turned on a light to show visible stains better, and scrubbed away. It didn't scratch the glass and got it out quick. Hope this helps.

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    Cleaning Thermador Cooktop?

    To clean the stainless around the star burners try applying Easy-Off oven cleaner around the stars with a Q-tip (spray the cleaner onto the stainless surface first because it's very hard to control the spray output). The cleaner will make your stainless sparkle and the Q-tips allow you to get close enough while controlling the application. Scrub gently with the Q-tip and the stains will disappear within minutes. Wash thoroughly with a wet cloth. I've used this on my older model Thermador stainless cooktop for 5 years.

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