At a meeting this spring, FM Quilter Susan Schmidt demonstrated a technique she has found does wonders at cleaning your grubby cutting mat. Place your mat in a sink or tub large enough for the mat to lie flat. Mix 1 gallon of warm water with 1/4 cup white vinegar. Pour over the mat and let it soak 10-15 minutes. After soaking, scrub with mild dish detergent. Rinse well and dry it with a clean dish cloth. Lay it flat until it is completely dry.

Susan also recommends The Mat Smoother sold by Missouri Star Quilting and other retailers for removing nicks, cuts, and burrs without erasing the grid lines.