Ahhhh thank you. That was my mistake for not filtering for that so I was seeing all the cancels (my filter actually says “confirmed” not “completed”, but accomplishes about the same thing)
Several months ago I was at 91% of people reviewing…now I’m down to 78%. (133 reviews/171 stays anywhere from 1-30 days, not including direct bookings)
I guess I need to go back to leaving my personalized yet boiler plate check out message. It basically thanked them for their stay, told them not to strip the bed, leave towels and used robes on the hooks, etc. then talked briefly on the importance of reviews. Really the check out instructions and personalized portion were just a vehicle for getting in the bit about 5 star reviews. I don’t really care what guests do for check out, aside from not stripping the bed!
I stopped leaving this b/c I was starting to feel bossy (and to be honest a bit lazy) but I think I’m going start leaving it again to get my reviews back in line. Also, since I stopped leaving the “check-out letter” I received two 4 star reviews. Prior to that I had 100% 5 star. Sad but true, the pandering for reviews works! 
I’m mostly kidding here, the brief section on reviews I wrote was tastefully done. It was cobbled together from many many posts/suggestions on this very forum!