I bought these and stuck them on my husband's truck tires for fun. I figured as soon as he saw her he'd blame the guys at work. It's been a month and he still hasn't noticed. The best part is that he had to air his tires last night but it was too dark for him to notice. Makes me laugh more and more. I went to check to make sure they were still there and they are. Everything is as clear as the day I slipped through them. It was SO DIFFICULT ;-) keeping it a secret from him, but I don't feel guilty. He would have done it to me, or worse if he'd had the chance. I've already asked for forgiveness if anyone in the church notices, so it's not my fault in case you're wondering. Have a wonderful day!