PH probe calibration problems

[Pepbill]

I haven't calibrated my lab grade ph probe in probably a month. Had the probe about 6 months. When I put the probe in 7 solution I get 7.44, not bad. When I put it in the 10 solution it goes up to 9.02 and then slowly drops to 7.5. I don't understand.

 

[Pepbill]

In looking closer at my probe when I hold the probe upside down i notice an air bubble floats to the top and the electrode in the clear dome is loose

Do I have a bad probe?