Only 15 Minutes of Steam [SEP] I have now used this twice - the second time with a stopwatch. It takes 3 minutes to boil water and begin producing steam. But it only steams for 15 minutes. After that, it makes a high-pitched squealing sound then cuts itself off. So you can only do a 15 minute treatment before the device overheats. Maybe this is sufficient for you. I was hoping to get at least 20 minutes out of it.