Hello, I need help with my dilemma. I am an Illinois medical cannabis patient & therefore able to grow my own. Currently about to start my 5th grow but am stumped on what I should do. I keep picking up a laundry soap type taste in my final product. Here's my set up; 2 tents (3x3x6),(4x4x6). [4x4- 2 ac infinity 4"fans(1 exhaust, 1 intake], [3x3-1 ac infinity 4"fan] plus regular fan for circulation inside tents. The exhaust for both tents vent outside thru old style small basement window(glass replaced with plywood). The intake air for the 4x4 is brought in from basement air thru 4" duct by 4" fan & filtered thru a charcoal filter setting inside tent. The intake for the 3x3 is basement air brought in by negative pressure as tent exhausts. The washing machine is less than a foot away from 4x4 & the tent has bottom square vents. I would have thought the charcoal filter would scrub the basement air of any odors before entering tent but still have a slight taste that is more noticable in bowls, etc than just hitters. I use promix soil & nectar for the gods nutes. Assuming that all else is ok & it's environmental that is affecting taste what can I do? Should I put intake fan & filter outside the tent & duct into tent vs what it is now- drawing air thru duct then pushed thru fan/filter which is inside the tent. Thought being that it would filter the air better? Or bring in filtered fresh air from outside? What about freezing cold winter air? Also I would have to exhaust into basement thru filter(for Smell). I am limited on money & approval for making holes in windows or exterior walls. As an added protection have been thinking about adding some type of barrier wall/divider between grow area of basement & washing machine. But not a simple task due to pipes n furnace ductwork. Pls help anyone this has got my mind twisted & overthinking.