MAKE SURE THE UNIT IS TURNED OFF AND DISCONNECTED FROM THE POWER PLUG BEFORE CLEANING

Clean your Pre-filter when the Pre-Wash indicator light is on by following the steps below:
Open the front cover and gently pull it.
Pull the Pre-filter upward to remove it.

Carefully wash with water or vacuum the pre-filter as needed.

MAKE SURE THE PRE-FILTER IS COMPLETELY DRY BEFORE INSTALLATION

Once clean, dry, and ready for installation, gently put the pre-filter back into its designated slot and attach the front cover.