This question is asked often and my answer is always the same................Think how uncomfortable surgery would be..
I feel the same about Epsom Salts .....makes me want to gag. But, olive oil does the same. Adding lemon juice or a sliced lemon to the already chilled mixture helps as well. Also, using a straw helps it go down a lot easier.
After the flush is over (which is ONLY 12 hours and most of that is spent sleeping) and seeing the results makes it worth all the trouble.