Pressure Pro sensor problem, maybe

I have the Pressure Pro system also and it is 6 years old. There is a seal in the end of the sensor that screws onto the valve stem. This seal is removeable and can be replaced. I remove the sensors in the winter when I am not traveling to save the batteries. I found that removing and installing much can wear the seals. I replaced all of the seals last year and have not had any issues since. Call Pressure Pro and talk to them as I found them very helpful.

Also, I question using the sensors with extenders as it seems this could cause issues with sealing the valve stems.