Hello…. I would like to ask a general question about the care of rubber seals here. Normally I use Vaseline and Talkum to maintain the seals and to keep them “quiet-free”. Rubber care products keep everything smooth, only after the care product is dried (after 2-3 weeks), the seals squeak again. To prevent this I still apply Talkum. However, the Nervige is that it is always a small mess, since the talc powder does not always end where you want it to end. Then I got the idea to simply use school crayons, because you can handle the chalk much easier and it goes much faster. Chemically, there is naturally a difference between talk and chalk but from the characteristics the difference should not be too big. Thanks for a few opinions… The Moose