Yesterday I pulled out of my sloped driveway and heard a sloshing sound. Grrrr - I've heard this before and last time my pollen filter was a soggy mess and the sloshing sound was water in the bottom of the blower assembly.
Today between showers I managed to get the wiper blades off and get the scuttle panel off and investigate. Yep, water-logged pollen filter again and water trapped by the recirc flap, and no doubt some had fallen further into the blower area.
I'd been meaning to re-seal the pollen filter housing with the butyl sealing strip as I've used on my door cards, so removed it and the old foam seal. That went smoothly and I managed to get the filter bone dry again before re-fitting. But my filter cover's rubber sides do seem quite distorted with a slight kink just in front of the kind of gutter runoff area.
I also discovered that the drivers side gutter had come adrift and the yellow foam above wiper mechanism (which I assume is for sound deadening) was hanging down and totally soaked - yuck.
Thankfully got it all back together before it started raining again!