Some of the numbers are stuck on my home phone - you know the big old fashioned one - not mobile. I think I may have dropped some water in between the numbers. Anyway I can clean them. Thanks
jj, you could maybe try giving them a wipe where the numbers protrude through the phone body with a dab of silicone ( Mr Sheen or similar has silicon in it ) on a cotton bud.
that's right OG - years ago I would have taken the top off - I don't think now as so much is welded. Methylated spirits absolutely cleans everything "electronic". I may try that as well. Ta all.