I ran out of time to winterize my trailer so I went inside and turned on the heat to keep things warm overnight until I could complete the next day. Once the fan cut on there was an awful vibration so I went up on the roof to investigate and found a mud dauber nest on the blower fan. But I also found what is in the picture above. Luckily both the birds nest and the wasp nest were not in use so it was an easy clean up. This is a reminder that you should check under your AC shroud at least once a year to keep this from happening – a good time to complete is during your winterizing process.