Have you retorqued the A/C hold bolts recently? They can work loose a bit over time, letting condensate or rain leak in past the seal.
Dutch
2001 GBM Landau 34' Class A
F53 chassis, Triton V10, TST TPMS
Bigfoot Automatic Leveling System
2011 Toyota RAV4 4WD/Remco pump
ReadyBrute Elite tow bar/Blue Ox baseplate