I think it started after the iOS 8 (or 7?) update, got a bit better with later updates, but has never returned to the ease and reliability it had before that first "buggering everything up" new shiney update.
Hi there Whothefuckissimon. Sorry about your virtual Pritt Stick problems. If it is an updates issue, obviously there may not be much we can do but we will ask Tech just in case they know of some sort of workaround and get back to you.