So at the beginning of the warm days between snow days this year my A/C worked. Now I'm attempting to fix it. It blows cool air but not cold. So i bought the refill kit to charge it. I connected the hose and can and have the car running w A/C on and I'm holding the button and rotating the can but nothing is goin out of the can into the unit. So when I pulled the hose off the car it was spraying oily liquid out so I immediately re attached it bc i know that's not supposed to happen. Now I don't know what to do?