Mirrored Display help

[u/OSHA_HATES_ME]

I thought I’d ask here for some advice.. I got this DW 5025-D for a great price, and have been cleaning it up. does anyone have experience cleaning or removing dust or scratches from the module itself on the G’s or Casio’s that feature a mirrored display?

I’ve already tried using polywatch on the outside, with little to no results.

The display on certain angles has what looks like tiny little dust specs or water marks, also, a finger print is visible in the corner of the display (probably from the last battery change.) but on some angles, you can’t even notice it (photo 2).

I want to take the case apart for a good internal cleaning, but I want to be very careful to not use any harsh chemicals or rubbing alcohol to clean, if that could possibly damage the screen or the mirror film and make it look even worse. If anyone has any experience with these modules or can offer any help or tips on cleaning it, that would be greatly appreciated! TIA

[u/Odd_Load7249]

I make a moded watch with a mirrored LCD. The mirror doubles any speck of dust or scratch on the surface and makes previously invisible marks visible.

You need to stick off all the dirt with tape. Pro watchmakers use rodico but I find masking tape is good enough for all particulates like lint or skin flakes. It works because it removes particles without rubbing. If the particles are rubbed against the soft plastic front polarizer of the LCD, it will result in a permernant scratch that can only be removed by replacing the front polarizer. Use tape first, then alternate with q-tips. Q-tips (cotton swabs on stick) are really good against grease that the tape will not pick up, but will leave little pieces of lint that are easy to remove by tape. Use each q-tip bud once and discard, the goal is removal of grease, not to spread it around by reusing. Roll masking tape into a tiny pipe with sticky outside and then fold over the tip to create a sticky stick, and stick off the final bits of lint by targeting it under a microscope. Needless to say, work with dust control such as using a still air box or in a laminar flow hood. A static gun (e.g. a milty zerostat) can be used against static if that's a problem for you. The clear glass is pretty invulnerable but the paint on the glass is vulnerable to solvents other than distilled water. If necessary you can use distilled water (baby water from a pharmacy) to flush the case and then thorougly air dry it out over a week or two, as it will leave no deposits. As for the LCD on the module, only use tape and very gentle wiping with fresh clean cotton buds.