Plain dish soap and water
. First rinse with water
from a hose, then wash with soft sponge and soapy water, then rinse again with fresh, inside and out. Towel dry with soft terry towel.
Or, a friend of ours has always used Mr. Sheen spray and a soft cloth.
If you don't want to use the hose, we've been using Novus #1 Plastic clean & shine. We've also used Meguair's cleaner, followed by the polish. You can find them in auto parts
stores, for use on lexan
headlamp covers. The polish removes minute scratches, which cause "hazing".
PS. If you are most marinas
in the developed world, you'll still be getting tiny drops of jet fuel
, diesel exhaust
, brake dust and dirt dust inside and out on your "clears", as well as salt
ocean spray when you sail. Pray for rain.