I know this was directed at negbbffwsk9pnpbttm but I'm going to answer it as well. I generally take a good hour to 2 hours to fully clean out. I also use a Shower Shot, enema but it is hooked up to my shower and I have endless water without having to refill something.
As for the temp of the water, To cold and/or to hot is bad for you. You want the water to be around body temp or luke warm or as mom used to say Teppid.
The to hot water will burn you mucus membranes in your rectum and you don't want that and to cold can have the same effect on those mucus membranes plus you don't have the same feelings in there as you do on your skin to know if it is to hot or to cold. So test the water on the back of your knee or your balls before you begin shooting it up your ass.