From what I've learned, you get something called micro bubbles in the fluid, particularly if some idiot shakes bottle/can
If you leave fluid sit, the bubbles may eventually work out but under pressure they combine and float to the top
in about 12~24 hrs
May be total BS but it works so sounded logical to me
It's a good idea to keep pressure on lever when you remove strap, bungy or whatever then allow lever to flick out quickly as it seems to cause any air to be sucked out of piston bore
