Re: how do you know?
What I usually do to see if I my shisha is burned is I just chew it and if it crunches like corn flakes then I got some extra extra well done shisha. .. just kidding. lol
It should just look like everything else that gets burn, black and crispy, the shisha on the bottom might not be as burnt as the top but if the majority of it is burned then your going to get the o' so dreadful burnt shisha taste.