Matchdot polarizer lenses loosening

Use a spot of your target pasting masking tape.

lobster claw rubber bands is what most use but if it gets real loose inside the lens will spin even if its housing doesn't so what I found fixes it is to put a dab of super glue on a tooth pick and put it on the inside lens at the bottom. Then it stays and turning the outer lens darkens it. Or the 3rd option is to remove one lens, then it acts like sunglass and stays one level or do like most and throw it away and wear tinted shooting glasses.

"do like most and throw it away and wear tinted shooting glasses."

This!
Tried using the filter when I first started, with the same frustrations.  Then went to polarized lenses in my prescription lenses.  No more problems.
Al

try zenni optical online, if you have your prescription you can get tinted glasses frames and all for as little as 20 bucks.

You can also buy the flip up polarizing sunglasses to go over your prescription glasses. They are pretty inexpensive. Yiogo

I've also seen the o rings for sale.  Ultradot says cleaning fluids ruin the rubber o ring. Yiogo

A small amount of silicone will adhere the lens to its holder (or, o-ring) and lobster claw rubber bands or simple tape will secure the two pieces from turning.