^^Good advice Rick. Never thought of that.
I was also gonna say check out your valve stem nuts. They require VERY little torque. Like 5Nm (I think), those 11mm nuts can back off and cause a slow leak. Its very common for these rigid TPMS valve stems to loosen up and leak.
Just use a 11mm deep 1/4 socket and snug them up. IF you over tighten them(or IF your shop did) you will break the valve stem and need to dismount the tire to replace the valve stem.