Hello All, I have an unbranded tap in the kitchen which is getting tighter and tighter to turn. I think the cartridge is identical to the grey Brev ones although it isn't marked as such. Like these: http://www.shop.lunns.net/moben-brev-plastic-cartridge-8344-p.asp I've taken it apart and cleaned it a couple of times and used some light grease on what I think are the relevant bits, but it doesn't seem to last long. Does anyone with experience know whether there is anything obvious I can do or shall I buy a new cartridge? There doesn't appear to be anything missing, broken or excessively worn. Any advice greatly appreciated. Thanks very much, Paul. btw. I've looked on here for a few years now but always found good answers by searching. I thought I'd finally join up. Cheers all.