One layer? Two layers?

Wow.

I use a minimum of 5 layers per cage.

And while snake poo is smelly, it doesn't hold a candle to cat litterboxes, which are so smelly I try to con other family members into changing those out.

I like the vinegar idea, I'll have to try that. I've been using a very dilute bleach solution (rinsed thoroughly afterward), but only if the cage still smells of urine/poo after it's been wiped down with a damp paper towel.