glass and the SLIP. Do not worry, the condensation will go away after the cleaner used evaporators. If condensation persists, either one or more of the Slip fastening screws is too tight, pinching off the air vents. If condensation appears, check the screw, especially near the air vents to make sure they are not too tight. The SLIP needs to rest snug to the sash but be sure not to over-tighten.