cleaning Jornada in bad condition

Hi! I recently got a Jornada 720 that is in pretty bad condition. I'll attach some photos. What tips or methods do you guys have for cleaning up these devices?

Take any removable stickers off carefully first. 99% isopropyl alcohol, distilled water, soft cloths and be careful of the stickers on the key caps.

is there a specific kind of soft cloth I should use?

Micro fibre should be fine. Something that won't scratch or be abrasive.

Maybe start with a gentle vacuum cleaner (brush). Then air sprayer.

We also use a microfibre cloth (e.g. style for eyeglasses), sometimes just slightly damp. Don't be too aggressive.

I would be extra careful with harsh chemicals, particularly with the screen. Don't apply much pressure to the screen either.

With plastic and rubber compounds, particularly older ones, we had problems with ammonia. But other chemicals always are a risk. The numbers on the keys or any other tags can be especially delicate.

Don't let any liquids leak inside via the joints, cracks, keyboard, etc.

I don't know what hinge fixes are available for that HP. But it might be less dangerous to clean a fixed machine...

All of the rubber on my HP devices turned to liquid goo a decade ago. You'll likely want to replace the feet if you haven't already as once they go, they mark - permanently.

Don't alcohol the screen directly, that is what the water is for. If you use distilled water and 100% isopropyl alcohol, it is perfectly safe to get all over the electronics though, provided they aren't powered.

You might want to re-grease the hinges too.