are you sure you are using Bubble Jet Set?
they make a companion product called Bubble Jet Rinse, which is just a mild detergent you can use as an afterwash. it's about the same strength as woolite.
does the printer ink wash out completely, or just fade more than will be useful? if the problem is serious fade vs. total washout, are you by any chance using an HP printer? not all of their newer inks are the greatest for printing on fabric - even with BJS. the manufacturer discovered that a few years ago and now sells a special formula for use in HP printers. i never got around to testing it, so i can't tell you whether or not it will solve the problem. neither of my printers now is an HP.