What's the least painful way to clean oven racks?

Bathtub, old towel in the bottom so they don't scratch, hot water to cover them, a few dishwasher tablets or half a cup of the powder, leave overnight. In the morning most of it wipes off with a sponge, stubborn bits with a ball of foil. Rinse and dry them before they go back or they'll flash rust. The only order that matters is soak first, scrub second. Scrubbing cold baked-on grease is where the pain is.