If you are vomiting up the SWF (Salt-Water-Flush) you should probably just go to two lax teas a day. How long are you letting the tea steep?I think the directions say up to 15 minutes, so if you aren't doing that, a longer steep time may help you get better 'results.'
I've read other posts that say the type of Sea Salt greatly affects the taste, so check the archives for the brand they recommend. I think it was Celtic Grey, but am not sure. I used Redmond and had no problem. Also, lay on your right side after drinking the tea or the SWF (Salt-Water-Flush) to help it drain faster into your intestines. Good luck!