Hello,
I recently got a 28S. It is in good condition except some glue in the cover. It is very hard glue, not like from textile band. The glue is above the alpha-keypad and covers the onprinted documentation.
Do you know any good method of removing such glue without damaging the calculator? I tried to cut it away with a knive, but only some sand-like parts came off. How durable is the printed documentation in the cover? Can I continue scraping on it and try several chemicals or better not?
Are there any chemicals which soften the glue but not the calc?
A bit of the same glue is on the calculators backside. Because of the bumpy surface there, it will be impossible to mechanically remove the glue without removing some of the calculators plastic. What could I do here?
Thanks for any advise...
Holger