Not sure if this is pertinent or not but as a k pouch we are taught to irrigate our pouches regularly in the beginning and then over time many of us do it on a regular basis. I tend to irrigate my pouch almost daily and sometimes at every intubation (often more than once until I have cleared out my pouch) ...some people believe that it is one of the reasons why we tend to have less incidence with pouchitis...I have no idea if it is true or not but my pouch feels better after irrigation.
I do not use warn water especially but whatever is "on tap". If I am dealing with sludge then I may prefer warm to cold.
Sharon