Chevrolet Corvette 2015 Owner's Manual page 62

Hand wash the convertible top in
partial shade. Use mild soap,
lukewarm water, and a soft sponge.
A chamois or cloth may leave lint on
the top, and a brush can chafe the
threads in the top fabric. Do not use
detergents, harsh cleaners,
solvents, or bleaching agents.
Wet the entire top and let the soap
remain on the fabric for a few
minutes. Wash evenly to avoid
spots or rings. When the top is very
dirty, use a mild foam-type cleaner.
Thoroughly rinse the entire vehicle,
then let the top dry in direct sunlight.
To protect the convertible top:
Make sure the convertible top is
completely dry before lowering it.
Do not get any cleaner on the
vehicle's painted finish; it could
leave streaks.
Keys, Doors, and Windows 2-33