Electrolux EDH13386GW Dryer's Incomplete Drying Issue After Three Years of Use

After three years of use, it has stopped drying from new, after almost two hours of grinding no matter what program the laundry is still very moist on. The dryer behaves the same; turns, heats up, etc. Sometimes, however, the program ends prematurely, although it happened before. After another drying cycle, it ends faster again, but the laundry is still damp.
The first thing that comes to mind is the humidity sensor, but I can't locate it, photos below. The second is maybe a clogged condenser / heater (I don't know what it's called exactly, but it looks a bit like a radiator in a car), it is right behind the filters, which are cleaned each time, so maybe there is no power? The air intake filter is rather absent, at least not located.
inquire

You need to disassemble and clean the fins, all ducts, turbines well, so that the air passage is not blocked. There may also be a gas system leak and thus low efficiency, not sufficient for drying.

I understand that the compressor is working? If so, clean the entire system.

I called for service - they stuffed the tubing underneath with a syringe of water. Together with the water they pumped up full of shit. Works better, but not like new