This thread came at a perfect time. I'm turning the house upside down because my brother's coming to visit. I've been using the guest room as my hoarding room, so it's horrendous and smells like it hasn't been aired out in a long time.
Filters:
I need air filters and I use the carbon sheet filter over the actual filter because changing air filter filters is bloody expensive otherwise.
I also have a few water filter jugs, the Brita ones.
My vacuum cleaner has one of those HEPA filters. I changed it a few months ago after I vac'd up a set of diatomaceous earth and wrecked the filter.
Even though I'm a magpie hoarder, clutter makes me go absolutely insane. I go through sporadic bouts of throwing tons of stuff away and swearing to live a minimalist life, but I don't have enough motivation to see that through. The worst thing about where I live is that 'donations' are supposed to be new not second hand. The times I've tried to donate anything, I've been met with 'Are you kidding me???' stares. So I end up throwing away a lot of stuff that is still usable, just not useful to me anymore. In the midst of that, a bloody centipede decided to slither out from guest room and make a beeline for me. I ended up smashing it to make sure sure sure that it was dead. I got stung once, not letting that happen ever again! Today I tried to smoke out the room by burning scented sticks, I have no idea if that worked but it sure did get rid of the musty smell.
I have no idea what the messiest thing I ever cleaned was. Probably the time when our city got flooded and everything on ground level sat in mucky water for two weeks. That was over a decade ago and thankfully I can barely remember any of it. I do remember trapping quite a few water snakes and chucking them out of the house though.