Our 2004 Prius's A/C has a leak. Rather than pay the 400-500 it would cost to fix it, I decided it would be cheaper just to recharge it once every summer. I tried recharging it for the first time today, but I came accross a problem. Even at 55psi on the gauge, I am still seeing bubbles in the sight glass. I'm a little worried since 55psi is in the "warning" section of the gauge. The bubbles are quite substantial...they fill up the whole sight glass and it looks "frothy". However, they come and go...sometimes it will be clear and sometimes it will be full of bubbles. So I have no idea what is going on. Does anyone know if the Prius runs abnormally high pressure in the A/C system?