I cleaned with a tissue and some pur based alcohol product. WD40 is fluid and doesnt clean that good as alcohol. When you do this use a product which evapored quickly. WD 40 doesnt do that and lays a layer on it. So something alcohol based will do. To undo the cover you have to use a bit, as you see in the picture still stuck there. Bcus that screw is hidden behind the wheel and there isnt a way to get the screwdriver in.

. I don´t have any bits small enough to fit the gap so I guess I will have to return the wheel anyway.
its so incredibly annoying to feel the wheel go offcenter... i dont want to open the wheel up.
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Now i wanna open this one up and see if i can figure out whats wrong with the sensor and why the wheel keeps going off-center... of course i'll probably end up begging for help in the forums. Have any of you guys already "fixed" the problem with the beta wheel going off center?