How do you keep squirrels from dropping acorns down chimney?

Answer 1

Install a spark good grade arrester. You might want to also consider a chimney cap or a chimney pot, both of which tend to keep out birds, bats, squirrels, mice, raccoons, snow, rain, leaves, and other unwanted debris. Some chimney caps are also designed to correct chimney backdraft problems.

Answer 2

burn them shoot them or put a net at the top with big hole but small enough to black the acorn and clean it out now and then so you wont die of carbon dioxide