I have had the same issue occur regarding condensate (B Pillar camera). It was during full daylight and followed a few hours of rain, so very high humidity, at about 45 degrees F. Based on the warning of camera blockage and the condensate that could not be cleaned off, I requested a service appointment but was told by the service team leader that "I had our regional technical support team look over the alerts on the car, and found that some condensation is normal for these cameras. If this continues to be an issue as in the alerts will not let you use the features in the car for extended amount of times We can take another look." I do not agree with this response and I plan to pursue it further with Tesla and NHTSA. It seems to me that paying thousands of dollars for the Full Self Driving option (when the software is finally working 100%) means that Full Self Driving should work and not be subject to random interruption by condensate in front of the camera (so... on any day with the right temperature and humidity, your auto drive may randomly disconnect). Apparently, random loss of Full Self Drive during high humidity conditions will be considered normal... but that was not my understanding when I forked over the cash for this option.I get the same message sporadically when driving at night also always on the right pillar camera. I have visually inspected the camera and it's clear and cleaned the glass anyway. Does not help.
Also, I have observed condensate under the glass of both of my pillar cameras but NOT at the time when I am getting the right pillar camera message. Is visible condensate under the glass a definite problem or is that normal?
I have had this issue occur for two reasons that I have discovered (so far).I have observed condensate under the glass of both of my pillar cameras
The blind spot cameras are not the ones in the pillars, they are on the front fenders.I have had this happen periodically at a particular place along my drive when the sun is at a low angle. After the latest update which enabled visual blind spot monitoring when the turn signal is on, I noticed the right camera blocked warning was on but when I turned on my right signal I can see a clear picture.