Room-by-room prevention.
A flour beetle doesn't need a fresh bag to survive. It lives for years on the dust and spilled crumbs already sitting in a cabinet, which is why the real prevention routine goes after that residue, not just the jar on the shelf.
Fungus gnats are a moisture problem wearing insect wings: the larvae live in the top inch of wet potting soil, not on the plant. Dry that layer out, water from below, and the adults run out of anywhere to lay eggs.
Clover mites swarm a sunny wall every spring whether or not you ever see one indoors, and the habits that stop them start months before the first warm morning. Here is the yearly timing, the lawn gap, and the entry points worth sealing now.
Booklice do not infest a room, they infest a damp surface in it, so prevention means drying what stays wet, not spraying what walks. Here is where that surface usually is, and the habits that keep it dry.
Carpet beetle larvae feed on the mat of hair and lint under furniture, not on a clean house, so vacuuming the edges matters more than any spray. Here is the full prevention routine, with the habit that gets skipped most.
A sealed container will not stop weevils that traveled inside the grain from the mill. Freezing new rice at 0°F for four days is the step that actually works, and bulk bins need one more check than bagged rice does.
Fruit flies do not appear from nowhere: they ride in on produce and stay where something sugary is fermenting. Preventing them is a short list of habits at the door, the fruit bowl, the recycling and the drain.
Cedar and mothballs both work by vapor, and vapor only builds up inside a sealed container. What that means for cedar balls, sachets, and closet storage.
Cedar oil has real lab evidence against silverfish, though with caveats. Mothballs, bay leaves, cloves, and citrus peel mostly don't. Here's what holds up.
A single seasonal checklist that ties together kitchen, closet, bathroom, and basement prevention habits into one printable pass.