Don't waste good money on diaper genie's and special diaper disposal systems. Start saving the plastic bags that newspapers come in and when you have a stinky diaper, put it in the newspaper bag, tie a knot and put it right in the regular trash. Make sure to carry some in the diaper bag also for when you are out.
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This is a way to get no "ring around the tub" when you're pregnant and the belly bump gets in the way of your bending over to clean the bathtub. Simply buy a cheap broom from the Dollar Store and use it specifically to "scrub/sweep" that tub sparkling clean.