Toyota Lexusc Owner's Handbook Manual page 740

Synthetic Leather Areas
The synthetic leather areas may be easily cleaned with a
mild soap or detergent and water.
NOTICE
Do not use solvent, thinner, gasoline or window cleaner
on the interior.
First vacuum over the upholstery to remove loose dirt. Then,
using a sponge or soft cloth, apply the soap solution to the
synthetic leather. After allowing it to soak in for a few minutes
to loosen the dirt, remove the dirt and wipe off the soap with a
clean damp cloth. If all the dirt does not come off, repeat the
procedure. Commercial foaming-type cleaners are also
available which work well. Follow the manufacturer's
instructions.
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