Thanks for the prompt responses! Yes I use alot of Armorall........never even thought of that as a problem. I will switch to a damp rag as suggested. As well, I will have the system pressure tested. What about a non silicone based conditioner? I used a great item on my boat that also blackened sun bleached black areas, much better than normal auto stuff, but cannot remember the name and left it on board when I sold it. Marvin Stein tel: 519 - 434 - 1666 fax: 519 - 434 - 7071 email: marv@xxxx web: printeddrinkware.com Printed Drinkware Company 924 Dundas Street London, Ontario, Canada N5W 3A1 [Non-text portions of this message have been removed]