My brother is obsessed with bird droppings in his garden. If he’s upstairs and sees a wood pigeon in the garden he’ll open the window and clap his hands to frighten them. If he’s on the ground floor, he’ll walk through the conservatory and stand in the middle of the lawn clapping his hands – sometimes he’ll stop talking mid-sentence to do it.
I on the other hand couldn’t give a toss about bird shit – no garden is going to be less hygienic because of it than a stretch of single track through woodland. Just wash it off your decking if it bothers you.
My brother has developed high blood pressure and an irregular heartbeat. Maybe if he didn’t worry about things which aren’t worth worrying about, he might be a tad healthier.