You don't.
The good part is that if they do simply wet it, wait a couple minutes and wipe it off easily.
Reference:
Cleaning bird poop off my floor every day from my pet birds.
One way to have birds to stop pooping there is to make sure to remove all bird feeders in your area. You also don't want to put a lot of trees in the area of your verandah.
by pooping
This fear is called Ornithophobia. the fear of birds.
You can create a cozy outdoor seating area with chairs and a table, tend to a small garden with potted plants, enjoy a cup of coffee or tea, read a book, or simply soak up some fresh air and sunshine.
kill them
There is a product out there called Bird-Deter that is specifically designed for use on a mailbox. It is a very simple design but it keeps birds off of a mailbox with harming them in any way.
yeah kill it
Because u have to get it out of your system
Drop it off a balcony
Unless the birds are causing harm to the balcony let them nest there. If their staying there is undesired wait until babies are hatched and gone then remove the nest and block where they are nesting.
tell your poo to toughen up?
No they don't. They love pooping on cars.