Foodsaver V3835 seals but will not sufficiently vacuum.

Vacuum Sealer Replacement Parts FoodSaver

Vacuum Sealer Accessories Parts FoodSaver

you are not using a "good" bag. Make sure there are no holes and that the bottom and sides of the bag are properly sealed. It will run all day and not pull the air out if the seal is broken anywhere.

Sorry to laugh, but that is too funny!
These retractable cords are very difficult to get back in order. You would be better off just closing up the sealer and allow the cord to remain extended. You could spend hours rewinding the cord and setting the tension spring when it pops open and makes you a crazy person.

Sounds like the foam seals are leaking. Go to their website to get replacement parts.

Hair dryer. Remove both tray inserts and dry thoroughly, paying special attention to the sensor area in the center of the upper tray.

Have the same problem. I'm looking for a solution too. The tray is dry and clean as a whistle. I cleaned all elect. connections and even dryed it all around with a hair dryer.

The tape trick didn't work for me. Had to cut the wires. Works for now.
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Does the vacuum seem to run forever and it doesn't seal?
Clean the black foam seals

Replace them if needed. they can be purchased from Tilia
WWW.FOODSAVER.COM

The negative pressure is very slight and almost not detectable when using canisters for food storage. Once the system is activated, and allowed to run until timed out, the canister should have pulled all the oxygen from the canister. Foodsaver only canisters are designed for the V3835 for vacuum sealing.

How to Vacuum Package Using Your FoodSaver® Vacuum
Packaging Canister
NOTE: FoodSaver® Vacuum Packaging Canisters can only be used with
a FoodSaver® appliance that has an Accessory Port. Please check your
QuickStart Guide to see if your appliance has one.
1. Place your FoodSaver® appliance on a fl at, dry surface and plug the power
cord into a standard electrical outlet.
2. Place the item(s) to be vacuum packaged inside the canister. Leave at least
one inch (1”) between the contents and the rim of the canister.
3. Wipe rim to ensure it is clean and dry.
4. Place the lid on top of the canister. If the canister has latches, put them
in an upright position so that the lid fi ts on the base. Push the latches
downward until they snap into place.
5. Insert one end of the Accessory Hose into the Accessory Port on your
FoodSaver® appliance.
6. Insert the other end of the Accessory Hose into the hole on the top of the
canister lid. Twist the gray tip of hose while inserting to ensure a tight fi t.
7. Follow the steps for vacuum packaging as outlined in your QuickStart
Guide.
8. Remove the Accessory Hose from the Accessory Port on the appliance
before vacuum packaging in FoodSaver® Bags.
Allow hot foods to cool to room temperature before vacuum packaging. Otherwise, the
contents may bubble up out of the canister.
How to Open the FoodSaver® Vacuum Packaging Canister
To open, press and hold down the gray rubber button in the center of the lid
until you no longer hear air escaping. This will release the vacuum and allow you
to easily remove the lid.

This is how Foodsaver work:
http://electronics.howstuffworks.com/gadgets/kitchen/foodsaver-system.htm/printable