Every month or two, give the pipes a good preventative cleaning to keep them clear of grease, oil, and hair clogs. Pour 1/2 cup baking soda down the drain, followed by 1/2 cup white vinegar. The mixture will foam up. Let stand for a few minutes to dissolve fatty acids, then pour boiling water down the drain to wash out any clogs.
My friend just tried this and is obsessed! Getting Blue Dawn today to give it a go...! Shower has never been this squeaky clean. 1 cup White vinegar heated up (microwave 1-2 min) with equal amount blue Dawn, gently shake and spray on and wait and then wipe away the soap scum. Thank you Pinterest!