woodpecker question

[Donna Gold]

Good afternoon! I've been a lurker on the Maine Birds google group - and it's always a joy to know what is out there...but now I have a question about bird pests!

We have a 100-year-old wood-shingled house. We feed birds with seeds and mealworms, and until this week, suet. 

Recently, we've been plagued with woodpeckers pecking into our shingles. 

We've tried: 

-putting up flashing disks in the corners near where they peck, that worked for a bit then they came back

-filling the holes with bleach and wood putty. They drill right into them

-spraying the sides with a bleach solution

-removing the suet.

We're beside ourselves, we don't want a house of holes! Do you have any suggestions?

Thank you so much!

donna