Hi Mender .... never heard of this before.... it`s always `` my hair is dry and I need to get it soft and shiny again``. If you`re not putting product/s on it , the only way it could possibly get anything like `oils` if from your own scalp...do you have an oily scalp ? I assume though, that if you had a very oily scalp, you`d be having issues of your bond/s coming loose. Applying knot-sealer [if you haven`t already] could help, as it forms an acrylic skin on the underside of the base....you could also try something like `scalp protector` on your scalp ..it`s supposed to keep oils away from your tapes/glues etc. That`s all I can think of anyway....maybe someone else has an idea and can chip -in.....system hair normally suffers from dryness, so this is a `first`for me anyway....cheers.