I agree with the compressed air. I would be careful of anything that might cause static electricity. I vacuum the panels of my Martin Logan SL3s every few months. I wrap a cotton rag secured with a rubber band around the tip of my vacuum hose. Then I completely vacuum both sides of the panels. The rag helps protect the painted mesh from getting scratch.
The parrots tend to be critics, especially the one that is named Monkey. If he does not like your choice of music he will start mumbling under his breath something about being naughty.