recently it has come to our attention that there is a new species of bird that we speculate is called the “Ring bird attacker”. Since sometime in November 2019 through today January 2, 2020 our ring doorbell has been attacked several times with varying degrees of bird droppings. These attacks have not been identified by the ring doorbell video. Leaving us to believe that this is a stealth bird attack and cannot be detected buy the ring video doorbell. This is led to us having to clean are ring video doorbell frequently over the last 60 days. See pictures attached.
Looks to me like a smart bird is sitting on the doorbell and using the infrared light at dusk or Dawn to get some bugs that are attracted to the light. You should be able to find a deterrent that you could glue to the top of the doorbell. That should stop the bird.