HP-30B screen protector secrets?

[John Garza (3665)]

Any secrets on how to remove this cleanly?
All products with screen/plastic protectors these days are easy to remove and leave no residue. Except HP and its Asian surrogates. A huge quality failure in my opinion. My machine is basically unusable. I've tried water, windex, goo gone, ipa. No good. Kimwipes get torn and leave paper bits stuck all over the screen. I'm afraid to scrub too hard for fear of scratching/dulling the screen.

Anyone else have a problem like this? Is the machine a lost cause?

-J

[Eric Rechlin]

I've always been able to peel them up with my fingernail. A little residue is usually left, especially on the corner where I pull it up from, and isopropyl alcohol cleans that up just fine.

Warning: some 30b calculators were from a different production run where the blue ink on the keys is alcohol-soluble and will be completely erased with alcohol, so be careful. Other 30b calculators are completely unaffected.

[John Garza (3665)]

IPA did not work at all and just made it worse. What DID work though was a completely dry fingertip (not nail) scrubbing it away. Then a polish with a dry Kimwipe. It seems any sort of liquid caused problems. Maybe the adhesive changed during long term storage as 'NOS' ? Who knows.

Now on to the machine: Keys 0,5,shift require extra pressure to activate. The shift key in particular causes lots of problems in sample calculations.

Design: nice looks, but they really need someone addressing usability. For example delta% (aka %CH) which is a very common business calculation. Several key presses to get to the 'percent menu' then a non-intuitive interface to use %CH which includes scrolling around to find what you want. And it was a single keystroke on the 12C.

And don't get me started on that retro-look low-res upper display. Coming from a SwissMicros machine it hurts my eyes to squint at it.

But hey, look on the bright side. I got 2 free CR2032 batteries with it!

-J