Now if they could eliminate the elimination part, they'd really be on to something!
There is a major improvement in this area -- It used to be they gave you a gallon of this cr*p to drink the day before called "Go Lightly". But as those of you who have used it know, it tastes awful (and it isn't easy drinking a gallon of something awful), and you don't go lightly.
Last week, when I had my last colonoscopy, gastrodoc had me buy two very small bottles of "Fleet Phospho-Soda". They are no more than about 2 ounces each. You buy them at the pharmacy, but I couldn't find, so asked, and the pharmacist keeps it in the back, but its OTC. The stuff doesn't taste great, but it's such a small amount that it's easy to take. You take one tiny bottle at 2 pm the afternoon before the procedure, and the second tiny bottle at about 3 am the morning of the procedure. It does clean you out, but it's much less hassle than that gallon of 'Go Lightly' stuff.
If your doc isn't hip to the newer stuff, tell him you prefer to use the Fleet Phospho-Soda. You'll be glad you did.