The GE Profile Ultrafast Washer / Dryer 2-in-1 combo unit has a big design flaw that allows lint to bypass the lint filter and build up on the fins of the heat exchanger / compressor. Over time, the combo will fail to dry properly due to lint on the heat pump.
The lint filter top, rear, and bottom ridges do not make a good seal with the filter housing. There are airgaps along these sides of the filter, which enable lint to bypass the filter and get trapped along the heat pump fins.
My fix for this is to tape some rubber foam self-sticking weatherseal on the filter to close up those gaps. I am using foam that is 3/8 wide x 3/16 thick.
The adhesive has been holding up fairly well, so i'm not concerned about it peeling off.
www.homedepot.com/p/Frost-King-3-8-in-X-3-16-in-X-10-ft-Black-High-Density-Rubber-Foam-Weatherstrip-Tape-R338H/100197882
It is definitely blocking a lot of the lint, compared to an un-modded filter.
I think GE should revise the filter housing design and ship out replacements to every combo owner. The current design is unacceptable and guarantees that the unit will fail long term.
There's a popular video by Ben's Appliances, where he apply silicone to the inside of the filter. I do not believe this addresses the main issue of the air gap.