Refresh a well-used and barely sticky mat.

Spray with window cleaner (I used Glass Plus) and then scrub with a Mr. Clean Magic Eraser.

Wet the magic sponge and then squeeze excess water out so that your sponge is damp.

Spritz the whole mat to wet the grid area. Use just enough pressure to be able to use a circular scrubbing motion. I had to spritz more glass cleaner on as the sponge soaked it up. I just did a once over and then rinsed the whole mat off under the running kitchen faucet.

Shake and wiggle the mat back and forth to allow as much water to come off as possible WITHOUT wiping it.

Hang to dry.

Get a new mat soon because this will NOT refresh your mat back to like-new status.