Are you bolusing the amount of insulin you've missed by having it off, after you put it back on after the shower?
No, cuz I only have it off for tops15mins.
In my opinion, the answer to your question depends on a few factors...
personally, when I shower, I remove my pump in my bedroom and leave it there instead of taking it into the bathroom with me. However, I don't think that makes a difference... My showers are generally quick (5 to 10 minutes) then I immediately reconnect as I'm dressing. I don't do any kind of correction bolus, nor do I experience the highs that you're referring to. I figure that if my basal rate is at, say, 0.9 u/hr and I am disconnected for 10 minutes (1/6th of an hour), I am only missing out on 0.15 units, not enough to make my BG go up drastically.
So now the determining factors for your case: How long are you disconnected/how long are your showers? What is the amount of insulin that you're not getting in that time period? Also, does your high BG last long? (read on about that one!)
The daughter of a friend of mine, a 12-year-old T1D, goes high too, just before a shower. But then her BG comes down on its own afterwards. Her mother thinks that it's just the stress of the whole experience that makes it go up. I HATE how stress affects my BGs!!! Anyway, could this be what's happening to you?
I do hope this all helps a little bit. If nothing else, it'll give you something to think about until Greg comes back online! LOL
Well the last two times it happened(the time my site failed at 5am and yesterday) it was for an extended period of time. I was 21 for most of the day yesterday, despite corrections and didn't go back down until about 1am...
I usually don't have it off for longer than 15minutes..though more often 10minutes or less and I always reconnect after i get out of the shower. my basal rate right now for 4am-12am is 1.25u/hr so maybe i should be correcting? i had at least 2 IOB when i took it off for my shower the other night..