I've read posts here from people who have More successful flushes if they stay up an extra hour or two before going to bed. While it seems to be recommended (possibly to help alleviate nausea?) everyone is unique.
When I take the Epsom Salts I get *very* loose watery bowel movements which really clean out my system. I normally don't see stones until sometime after being up the next morning and then usually progressively more throughout the day. Everyone is different, so just hang in there and keep us informed! =)