It's a total loss if OP doesn't try, but op only loses IPA if they do. just submerge the whole thing in a tub amd let it soak/ softly scrub. As long as they dry it realy well, it shoudn't hurt anything (might take off the white labels though). I don't know how much these cost, so maybe it's not even worth the trouble. Screwing it to the door like it is, is just going to attract ants though.

I'd disconnect and maybe disassemble everything, then use IPA and a soft brush to clean everything. Let it dry for a day in a warm, dry place with good air circulation and I bet it'll still work after reassembling it.