Why Can't I get the cap on tight enough?

I can only guess since I have never worked on one of these units, but I think you lost a gasket on the cap. Pressure must build in the reservoir before being forced out the nozzle.

Check that the cap or lid has been screwed on tight and that it is seated properly. Make sure the seal or o-ring is not missing.

You need to completely annihilate the plastic cap by cutting it off and destroying the remaining plastic to expose the stainless steel insert/plug. You can use either a pipe wrench or 11mm wrench to turn the insert counter-clockwise to unscrew. You will need to use some force to get the plug out since it's basically glued shut by lime deposits in your tap water.


Do not move the slotted cap or else this will need to be adjusted so that all your water doesn't squirt out before turning to steam.


Next time only use distilled water. Store with the cap off. Grease the inner and outer threads after every use and wipe it off completely before use so it doesn't mix with the steam and turn to vapor.

possible clog or build up of dirt on floor mop part.

IS cap for water on tight and not overfull?

you dont need a new steam cap if steam is coming out of the top, that is supposed to happen when the hose is clogged, it would be very dangerous if that didnt happen, the amount of pressure that thing holds is unreal if you think your cap is leakin steam take a second look. if the cap is not physically damaged then it should be working fine, 9 times out of 10 your hose is clogged

You need a little more leverage--either a strap type tool or a pair of adjustable width pliers that span the width of the cap. Try running hot water over the cap first which may loosen it enough to remove by hand.

Make sure the cap and the inner valve is seated tightly. There should be a black rubber gasket to help seal the cap and valve. A quick test is to fill the cleaning soultion tank with water (so not to waste the cleaning solution) turn it over and see if it leaks. If not then the problem would be where the tank sits in the unit. Make sure there is no debris in the unit where the tank sits.
good luck
D...

THE FILL CAP ON MY SC505 IS JAMMED. CAN NOT REMOVE THE CAP. WHAT ARE MY OPTIONS.

The fall might have damaged or moved the trigger so that it does not depress the valve on boiler.
Try removing the screws which hold the handle together. The cap needs to be removed to allow the handle to separate.
Once the handle is apart check the trigger piece looking for any broken parts.