Cleaning keyboards etc.

[acapde]

(03-04-2018 10:08 PM)striegel Wrote:  

(02-28-2018 01:36 AM)acapde Wrote:  I have had good success using WD-40 to clean calculators and other gadgets.

There were a couple of mentions on the HPLX mailing list where WD-40 was tried as a lubricant in the hinge for the top and found to attack the plastic, even in small amounts.

Daniel Hertrich's repair page says never to use it.

Alan

Hi Alan,

I just cleaned my HP200LX with WD-40 and took a picture (below), no problems except that is a bit shinier. By the way, my 200LX has the worst case material I ever seen in a handheld device, it cracks just sitting inside a drawer, in fact you can see that it's already cracked (top-right) and lost one of the hinge covers due to the same issue, this happened long ago, when it was still pretty "new".

I don't have any dirty HP calc but I was fixing a beaten TI89 with a lot of glue residues and cleaned it with WD-40. Much better after that (also picture below).