hi all I'm sure I've read lots of posts on here but can never find them when I'm looking ..... but wondered if anyone else is having problems with continually blocked superrain II spray system .... I use bottle watered as recommended on here ... but still seems to be a bit of a build up of calcium residue (I'm presuming) ..... I have taken off spray parts and soaked them over night in a number of things including denture tablets, vinegar and even kettle descale but nothing seems to get them back to spraying properly .... help .... any ideas????? Michael