Thanks The Builder & others for help & advice, our Bungalow was built in the 70's, the previous owners had cavity wall insulation installed, our central heating comes on about 6am until 9 am & then as & when required during the day. We leave the window open after having a shower & I wipe everywhere down including the shower curtain.We do get a lot of condensation around the cistern & I leave a towel underneath, my husband is disabled so cannot help me, so find all this difficult to deal with, would it help to get a builder to paint with the special paint you refer to, the only snag I see is I love the colour I have (lilac)