I put my microfiber cloths in one of those delicates laundry bags and toss it in with a regular load on cold, then let them air dry. Never had any problem with them scratching lenses.

Uhhhh if someone is asking for a randomly generated authentication code you might want to double check who you’re talking to and make sure you’re not being scammed.

Edit: seems it might be normal? https://forums.xfinity.com/conversations/customer-service/customer-service-asked-for-my-2fa-code-to-verify-my-account-over-the-phone-despite-the-text-saying-not-to-share-with-xfinity-reps-normal/6410d59641879c3c4d1c6128

Holy shit that’s bad practice. Great way to get less tech savvy people used to customer service reps asking for verification codes and trusting them without hesitation.