The egg carton shelf trick that stopped my roommate's science experiments
My roommate kept leaving half-eaten takeout boxes in the fridge until they turned into biology projects, you know the kind. After 3 months of throwing away fuzzy containers, I bought a $4 pack of 12 reusable silicone lids and put one on every open dish the second he walked away. He thought it was passive-aggressive at first, but now he actually uses them because his food stops drying out too. The real kicker was labeling the shelves with painter's tape, so he finally sees where his stuff ends and mine begins. Has anyone else found a cheap fix that just clicks with a messy roommate instead of a big fight?