Soap to clean kayak?

whatever comes out of the hose....washing off after landing -after gear comes off-once or twice roll it over out knee high....a rinsed kayak is way better to deal with after it blows dry home.....soap? I'm not sure ---hose it off -soap works to put long screws in wood...just in case ...and for cussing kids

dawn works tho....a couple drops in the washer once every other trip --after hosing down -nrs booties and farmer johns stay way cleaner with a spoon of dawn on gentle cycle too-- her white cobra kayak likes dawn and comet and a broom brush once after winter rains stop