The best way to fix wood shutters is to remove them from the wall, repair any damage, and then reattach them. If the shutter is not damaged, you can clean it by using a wet cloth and some soap. Make sure to rinse off the soap and dry the shutter completely before reattaching it to the wall.

There are a few ways to fix wood shutters. One is to simply tighten the screws or nails that hold them in place. If that doesn't work, then the next option is to fill in any cracks or holes with wood putty and then sand it down until it's smooth. If the shutter is really damaged, then you might need to replace it.