Rinse under the faucet with medium-warm water to get any dust/grime off, then dry using medium pressure with a hand towel size microfiber cloth. That's all you

Rinse under the faucet with medium-warm water to get any dust/grime off, then dry using medium pressure with a hand towel size microfiber cloth. That's all you need to do. I use the cloth for a couple months and then toss it. They're never the same after being washed, and they're cheap enough. I bought a 24 pack for $7 on Amazon in 2017 and I'm still working my way through it. I've had this pair of glasses for about 4 years and they're perfect.