One stone ... Two birds.

Bird the first ... We seem to get some incredibly dirty rain around here. Several days ago, just before a goodly downpour, and while it was actually raining, I went out with the hose-brush (hoseless) and gave it a good, allover brushing. The result was that all the dirty, rain spattered, stuff washed off.
Bird the second ... Some time ago now I Blipped some flowers at different times of day to illustrate the fact that they, metaphorically, went to sleep at night. Can't, for the life of me, remember if I've done it once or twice, but I'd never noticed or even suspected it in our flock of Sanguinaria, seen also in the car door.