The thing about tips is that none of them will work if I don’t actually use them. Which I found out the hard way a few years ago when I was looking for an out of season clothing item and found moths crawling around in my hero’s and my cashmere sweaters, still under my bed.
What really works is to store winter clothing in the freezer.
Moth eggs when they have been frozen for a certain length of time (anybody know the exact length?) will never hatch. Works with flour too.