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https://www.youtube.com/watch?v=Fn1kehaYIYM&list=PLkVbIsAWN2lvK9wLg2pwcXJLut_-_P9G4
somewhere in there he tells you, its like 125ml per 4 gal or something like that
use an anti static feather duster, if you get fingerprints on the lcd you can use low stick tape and roll it gently on the lcd, it will lift prints and glass, as for the backlight I wouldnt want to touch it with anything
have a look at apples iphone 7 screen replacement charge, its all about cost of parts, for me ipad pro screens are $600 each and iphone 7 is $240, (AUD) these prices come down once the chinese start making copies, we cant compete with apple until there are copies. if you want to do ipads, you...
I dont get any residue, maybe try using a larger amount of alcohol, and filter it, i use a cheap broken ultrasonic cleaner just as a container for alcohol, its around 6 liters. after ultrasonic i put the board in the alcohol for 20 minutes or so and move it around, take it out hold it in front...
i hope ur not using IPA in the ultrasonic cleaner, that will lead to a fucked up day, just buy 99% IPA off ebay, and as for cleaning fluid just look at the msds of branson and find whichever is closest where you are