Tube Lubricant By timw on 3/23/2013timw would recommend this product to a friendI use this lube often, and always keep some on hand. Every 6 monthsor so, I take the tubes out of the dosers and add a little, to refreshen the lubricant. I can't prove that it will extend the life of the tubes, but I truely believe it helps. Gives me peace of mindm and thats good enough for me. I have also used it on o-rings.