As usual, the CO/LP detector did not go off until 1AM. Sure is noisy at that time of night! Anyway, since the life cycle of these devices is 5 years, and our coach is now 4 years old, thought it would be prudent to replace it. So here it is, a brand spanking new (manufacture date March 2019) CO/LP detector.
Also, the Thetford toilets are quite water frugal and work great in an RV setting. But the ball that seals the opening is quite sensitive to dirt and aggressive cleaning. Ours was starting to leak down so I installed a new ball and seal. Should be good for another 5 years or so.