Leave the mats in full sun for 4-5 days. Most of the lighter carbons
will evaporate or break down. Wet the mats on a concrete slab,
sprinkle on a laundry powder, add a cup of rubbing alcohol over the
mat, massage for several minutes with the fingertips, rinse thoroughly
with a hose, drip dry in the sun. For a more powerful wash use TSP
instead of the laundry soap and use rubber gloves or a shampoo carpet
machine to avoid skin contact.
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