Participant Photo: Avian pox on finch

Not a good photo but I have a feeder on my apartment deck that’s quite popular with a variety of birds. One of the finches was struggling to stay on the feeder a few days ago and it looked like he had a growth on his foot. This is the best photo I could get of him. He’s got a lump on a hind toe and a lump on the forward facing toe of his right foot. It appears to be avian pox. None of the other birds appear to be affected at this time. I’m upping my cleaning of the feeder and going to bleach it every few days. Not sure if I should remove it for a while or not though. Advice is appreciated.