Bleach is another good alternative. 1 tablespoon/gallon cool water and time. I'll soak my fermentors O/N and they are sparkling clean in the am. It needs to be GOOD bleach - slight yellow/green tinge is the good stuff.
I use bleach/hot water rinse, nefer had any issues with infection. When I bottle I use a small ammount of bleach and wash them in the dishwasher, no infections there either. Never used anything but bleach.