We always take the hose with the spray nozzle on it to the tree. It cleans all the dirt off & loose needles. The tree ends up prettier in coloration without the dust & dirt. We let it sit outside till it dries.
I am a strong believer in the simple fact is that what matters in this life is how we treat others. I think that's what living is all about. Not what I've done in my life but how I've treated others. ~~ Sharon Brown