Hi there, I'm just finishing day 5 of the Master-Cleanse too. 18 pound weight loss is spectacular, I've lost only 8lbs.
I too, find it hard to stomache so I down the lemon and maple syrup with the cyanne pepper as a "shot" then I drink loads of water. I find I just can't get a glass of it down and end up not drinking it at all. Have you tried it at different temps? My mom likes it really warm.
I can't stand the maple syrup either, but you need it for energy and the minerals. If you leave it out you are doing a type of water fast. You could look into other juice fasts, I don't know much about those, but there are a lot of people around here that do.
Anyway good luck and I hope it gets easier for you,