While in the shower last night I was thinking about this problem and I think I may have come up with a solution.
Take a douche bottle and fill it half full with water. Fill the other half with scent a way body wash and shampoo. Screw on douche nozzle and shake vigorously. The foam created at the tip of the douche nozzle should act as a lubricant. Ram that thing up you arse and squeeze. Repeat until douche is empty. After that one thing is for sure. You butt hole is going to be hurting, or you won't smell any of your farts for a good week.