Air Conditioner vibration

I finally worked up the energy to climb onto the roof and remove the a/c shroud. Sure enough, there was a hard 3" mud nest by the hot side squirrel cage but it had fallen off the cage and was lying on the floor of the a/c. I had DW turn the unit on while I watched it and the motor was still shaking back and forth about 1/4". I concluded that there must be more stuff on the cool side fan. Sure enough I could see 3 50 cent sized blobs on the inside of the inside squirrel cage. I was able to get most of the mud out by poking a screwdriver through the fan louvres(?). There was also a 3" blob on the wood frame for the a/c. I removed all the debris and the fan is much smoother now - still a bit of vibration but for all I know that's how much it has shaked ever since the rig was new. Storage covers this summer. Anyway, problem solved.