Problem Vision System Blocked fly with caution

[Rchawks]

I referred to the manual and didn't see this error or alarm listed as such, it was a audible warning and said to fly with caution. I did notice after lifting off and hoving it seems shaky, but after increasing altitude it did subside and smooth out. I guess the auto calibration took care of it. But still the alarm or warning about vision system blocked fly with caution. Could the sensors just be dirty?

PS to the moderators, I'm sorry I just noticed this isn't in the problem help thread.

 

[Rchawks]

Cleaned the sensors with felt pen from GPC case and it seemed to solve the problem. Condensation from AC to outdoor heat?

 

[dirkclod]

That could do it. I occasionally take a Q-tip and stick it in a bottle of alcohol and clean mine.