About two days ago smelled antifreeze and noticed smoke coming from under hood. Opened hood and the noticed that a small cap on the AC line was loose and tighten it. Most of the coolant had leaked out of the reservoir. I could see small pockets of coolant on engine parts. Cleaned off any coolant and lightly rinsed engine off. I then filled reservoir with more coolant. The next day, the same thing happened and this time with a power steering problem. Don't know if stiff steering wheel is because of coolant that sprayed on other parts or what. There was also loud squealing when I stepped on the accelerator but it has since then went away. There is definitely a coolant problem but I can't find the cause.