Chosen Solution
I have done many repairs before so I am not a total noob however I have just recently attempted to do a glass only screen repair on an iPhone 7, I got the glass of perfectly without problem but the glue that remains on the lcd seems impossible to get off without breaking the lcd even though im using 99.9% isopropyl alcohol. Any tips on how to overcome this? thanks in advanced.
It could be that you are trying to take the polarizing layer off in which case you would have to fully remove it and buy a new polarizing layer. If not, try using acetone.