I've got the same thing. Been to the opticians a number of times to get it tightened (can't see enough without my glasses to do it myself...). Been meaning to get their opinion on it but can't see a tiny bit do any harm. Unless it reacts with the acetate?
I think you can rub them with acetone, but I'm not sure. That's what my memory says but a quick google says not. Conclusion seems to be to polish and oil to get the shine back, bit it has tp be done every few weeks
I've got the same thing. Been to the opticians a number of times to get it tightened (can't see enough without my glasses to do it myself...). Been meaning to get their opinion on it but can't see a tiny bit do any harm. Unless it reacts with the acetate?