Locate your furnace filter.

Power is on right now. Flip to off.

Make sure your power is off and wait about 20 seconds for the power to discharge.

Use a low-acidic wash, like simple green. This is our commercial grade wash...

As you spray the solution on the cells you should notice the dirt lifting up...

And the dirt is coming off!

Use a low to medium pressure garden hose to wash the solution off. Flip over and repeat. The idea here is to remove all the solution.

Leave leaning somewhere outside for all the water to drain out and dry. This should take about 45 mins- set them and forget them.

After they are dry, insert back into slots. The arrow points towards the equipment!