Check the manual that came with your vacuum sealer to make sure that you are using it correctly. If it still doesn't work, contact the manufacturer or the store where you bought the vacuum sealer.
Clean out the brush, for starters. You might need a screwdriver or a coin to open the compartment, then you can use a razor blade to cut through any hair...
You can if you have a refrigerant dehumidifier that is connected to your central air system. Otherwise, you'll need to use a portable dehumidifier to remove moisture from the air.
