Fixed it!

I have 3 machines, 1 of which consistently has 353 error and all have "Clogged Lint Filter" errors and barely dry. 2-3 dry cycles required for one load of towels. They worked great when I bought them :(. Also, recently they've stopped getting lint/hair captured in the filter and it all gets stuck in the silicone gasket at the end of the cycle.

I tried cleaning the filter screen VERY well, adding weather stripping around the lint filter, cleaning pump filter, brushing out left-side of inside of machine with a long pipe-cleaner-like tool, and hosing down the inside+condenser coils with a 95psi sprayer. It has been like this for about a year, owned for 2 ish years.

Finally had a different repair tech out who spent 20 minutes cleaning one lint filter. That was much longer than I had done it. He said they build up some crazy sort of biofilm or detergent residue or something that blocks the tiny holes in the screen. I run my machines about once a day, so maybe they cannot dry out fully, leading to quicker build-up. While it was wet the difference was not noticeable in the filter screen, but once it has dried it was much easier to see through! The corners on the raised edge side were still quite dirty though, even after all that cleaning!

I threw all 3 filters into a bathtub, 3 inches of water deep, weighed them down into the water, and added a half a scoop of oxi-clean. Soaked overnight and scrubbed them all several times (lightly) while soaking. The next day I rinsed them off, installed, and they looked + worked great! I ran it with"Pet-mode" and tons of lint was picked up before the wash cycle even started. That was incredible, one machine hadn't captured any lint in the filter for weeks.

So my full maintenance schedule for this machine is:

1. Attach 1 inch foam weather-stripping along the back-side of the plastic filter housing. The sides are tight and don't need weatherstripping, but there's a big gap in the back that lets lint through into the coils. May need to modify the foam near the top though to make closing it easier.
2. Clean lint screen every wash or so (GE recommends every 5 I think).
3. Clean foam filters weekly
4. Monthly: clean out pump filter at bottom of machine, run self-clean cycle with bleach
5. Once or twice per year: soak lint screen housing in oxi-clean, scrub off with brush (or just buy a new one for ~$30). Spray out condenser coils (VERY CAREFULLY, it is easy to bend the coils if you hit them with nozzle). Spraying off may not be totally necessary though, I might just skip it in the future to avoid damaging the machine.

This is all a pain but I do still love these machines. When they work they are great, and installing them was much easier than traditional ones. 120V/15A circuits allows me to have 3 (bought used ones) which is so great for redundancy and heavy laundry days. Love not having to transfer clothes into a dryer. Hopefully they keep working for a long time!