Problem: bird nests in gutters.
History: house was built in 1993 and gutter on front gable extends 8-10 inches under the eave to butt up against siding.
Birds have a "natural" shelter from wind/rain/etc under within this recessed area. I've tried a couple of things to discourage them by removing the nesting material soon after it's brought in but they keep rebuilding.
are there any "bird repellent" type things I can do to keep them from rebuilding? This is a constant problem and I'm afraid the buildup could result in water/ice damage if left alone.