Remove pigeon droppings from the balcony?

Hello. I have a problem. I haven't been home for two months. I came back a few days ago and found my balcony completely abused by those pesky city pigeons. I've read a lot about the topic, but my question remains: Can I remove the garbage myself, or is it too dangerous and should I report it to my landlord?

I read on Google that you can remove the mess with vinegar and a spatula. I saw this pigeon yesterday and apparently chased it away enough times that it hasn't been seen again today.

Perhaps it might be helpful to mention that I just moved in and have absolutely nothing on the balcony, including no crumbs or even leftover food.