
It's funny you mention that. I took a road trip to visit family over the holiday and on Sunday afternoon I noticed my pressures were a little low. Stopped into a Tire Pros that was about to close and got an air check. They brought everything up to 36 psi, but now my left rear has a slow leak. It went down to 28 before the TPMS notified me. Had to fill it back up twice on the way home. I think he must have damaged the valve stem, but it looks clean as a whistle on the inside. Now that it's light out in going to cover it in soapy water and check for a leak.It's about the technician, not the tool. Almost every shop will use impact drivers to zip lug nuts off and on. Lazy techs can scratch wheels, strip lugs and round lugnuts if they don't pay attention.
No matter what, you should ALWAYS double check the torque on the lugnuts and the air pressure in the tires after visiting a tire shop.
I'm to the point where the cars I really care about I keep a spare set of wheels (or put the wheels up on stands) and only take the wheels to the tire shop.
Good advice. I took it to a tire shop and they found a tiny little machine screw embedded in the tread. Patched it up for free and sent me on my way.I had two bad valve stems straight from the dealer. Tire shops charge ~$10 to replace a stem. Try to find the leak. If it's the stem or a puncture that can be plugged then I'd say just go to a tire shop. Quick and cheap. If it's the bead or not-fixable then you have more to think about.
Try to NEVER use fix-a-flat unless it's a real emergency. That stuff is gorilla snot and makes life hell for every poor soul that ever touches that rim.