Holding the handle down causes it to use more than the designed 1.6 gallons. From the ones I've used, if you need to do that, you may have an obstruction somewhere slowing down the flow, and preventing it from emptying properly. The other possibility is the users are rolling off a huge amount of paper or they have abnormally large bowel movements. It never ceases to amaze me how much paper some people use. After all, it came out of you, and you ARE going to wash your hands afterwards anyways. Try taking a bucket and fill it nearly up. dump it in the toilet and see how fast it drains. If there is a backup, you have a drain problem, and it isn't the toilet's fault. My mother grew up in the depression, and they were limited to 4-squares of TP per use. Now, I do use more than that, but the idea that you need a huge wad of the stuff just always seemed foreign to me.