Philips 40PFL8606 User Manual page 9

In rare occasions, depending on temperature and humidity, minor
condensation can occur on the inside of the TV glass front (on
some models). To prevent this, do not expose the TV to direct
sunlight, heat or extreme humidity. If condensation occurs, it will
disappear spontaneously while the TV is playing for a few hours.
The condensation moisture will not harm the TV or cause
malfunction.
Getting started / Setting up 9