Keep The Drains Clean
Nothing beats the work of enzymes to keep drains clear both in your boat and at home. Happy Camper contains some of the strongest enzyme products on the market today. Pour a half a scoop down your drains at night and just let them "eat" away at all that buildup. Works at home as well.
Eliminate soap buildup in showers by switching soap. Use a liquid or glycerin soap to shower and wash your hands. The talc in bar soap builds up on the sides of drains eventually clogging and congesting them so they don't drain properly. Switch soap and solve that problem.