ALWAYS try on a shit card first. One thing I’ve used that works is computer monitor screen cleaner and a fiber cloth. That said, any time you’re using a chemical or fabric, ALWAYS TEST on a similar but dirt cheap card to see what the result is.
Haha, good for you! On the plus side, this sure beats the people who took the advice of someone on the internet and microwaved their iphone for “better” performance!
Now we just have to make sure next time…that no one takes the sand paper advice seriously.