ooohhhh...do invest in a juicer. it's one of those handy tools when you're fasting or cleansing of any sort.
i have one (got it for cheap, you can check out garage sales, or your local classifieds for second hand ones) that does both veggies and citrus fruits. i couldn't imagine sqeezing grapefruit by hand during a liver cleanse when i can barely focus after those nasty Epsom Salts !