We sort of had this problem with sliding shower doors, which were impossible to clean. Eventually we. replaced the lot and we now have a lovely walk in shower with no moving parts to get manky. You could try contacting the manufacturer, they might have a suggestion, even if it involves dismantling the whole thing and reassembling it.they may even send someone to do it you never know.
Evolution - BBC2, Chris Packham
Talking throughout an exercise class





