I guess I haven’t really had the smelly problem (or at least nobody has mentioned it…). I have to use unscented detergents due to fragrance allergy, and I think thats a big part of why I don’t have that problem. The scented detergents leave so many residues to hold the scent that your own scent tends to stick more. Or maybe you just notice it more as it mingles with a scent you are used to. Not sure, but the unscented stuff at worst smells a bit musty.
When I get deodorant buildup or the musty smell, I do a warm cycle with enzyme detergent (usually wash on tap cold, but when I do a warm cycle I use dirty labs unscented enzyme detergent. I’ve tried others, including scented, before I found that and they worked decently too) and it clears right up.
If you have the smelly problem with bedsheets or towels or anything, look into laundry stripping. You can do it with natural cotton and whatever clothing as well, but it requires super hot water so it does cause some damage to the fabric.
I made some video game themed Xmas ornaments out of air dry clay as a gift… they turned out fine, but I didn’t realize the paint I used on them didn’t do a good enough job sealing them up. They should have been resin-dipped. In places the paint cracked, moisture got in, and over a couple years expanded the paper-based clay through the cracks so they look super creepy now. Very disappointing.
Mistakes are a great way to learn, though.