iPhone 5 and 5s LCD glue removal, Alcohol doesn't work

Hello guys,

I have looked on this forum for my problem, and i tried everything to remove the glue from an iPhone 5s lcd .

I have successfully separated the glass from the lcd screen of an iPhone5s, but i cannot remove all the glue over the lcd. I tried to heat the screen and remove it manually and using 30° alcohol and nothing happened. I finally tried nail varnish remover and i removed the 80% of the glue but there are still some residuals. These can't be removed even with 90° alcohol.

Do i need an higher concentration of alcohol? What do you suggest?

Finally, can i do the same with an iPhone 5 lcd ( I don't know if the layers order are the same and i am scared to damage the higher one)