If you remove the glass panel with a suction cup, you can clean the inside and outside with an iphone or ipod microfiber cleaning cloth (thats what i use)
alternatively, you can use a dust/lint roller on the screen (apple has a kit for it, but its not cheap, or made to be bought for a once off use, here is the link)
The difficulty is making sure you dont leave finger prints or smudges on the underside of the screen. also, try and find as clean an environment as you can, as dust will always seem to settle in between the layers while you work on it. A tip is to tilt the display as far forward as possible, then dust falling straight down wont land straight on the LCD panel...
It typically will take a few on and offs to get it perfect, but having natural light from a window helps show up any smudges in the process.
We have a chance to guarantee our right to repair electronic
equipment—like smartphones, computers, and even farm equipment. This is a once-in-a-generation
chance to protect local repair jobs—the corner mom-and-pop repair shops that
keep getting squeezed out by manufacturers.
Join the cause and tell your state representative to support Right to Repair. Tell them you believe repair should be fair, affordable, and accessible. Stand up for your right to repair!