I find that watching Barnsley play out of defence in our own penalty area usually does the trick. However, having just had a camera up my arse in BDGH yesterday, the clearout powder for that (Klean-Prep) was dynamite in its eficiency. 4 sachets in 4 litres of water though, tastes none too smart. I doubt that the general population are let loose (as it were) to buy it.
They might be but they got me through the last few days & now I am back to Normal both kidney & intestine wise.