I bought 25 knowing my skepticism about this product and not knowing if it would withstand the summer humidity here in Illinois. But I've tried heating them in the microwave and hot water for 20 seconds and even setting them at different angles to pop the "last bubble" that I think builds up during installation and for some reason always does still postponed. I replaced my last reserved 5 lug nut caps to test this product again and am now very confused as to how other people haven't encountered faults while I've encountered them so many times that I drive like normal motorists on the road every day have to drive on the freeway. I like the idea of having them and was planning to order blue caps for the 21-23mm nuts but I don't know if they are still needed because I don't know if the ones I received , only are faulty. wrong forms. anyway, or maybe i'm just unlucky, does anyone have a better idea, or should i consider looking elsewhere? PS vehicle: (2020 Toyota CH-R; 21MM NUTS)