Hi I'm just looking for a bit of help/advise, I'm having my firstflexible sigmoidoscopyon Thursday at 17.15 in the evening, I had a package sent to me with info of my appointment and a bottle of enema, but nothing to say when the best time to use it would be, it just says that i cant eat any thing after taking it, would morning time be best or the night before? any advise would be very helpful?