Good you caught that , good job.

thank you

The moisture around the vent is what the dryer pushed out of the clothes, not rain.

Thanks for showing us how to do it wrong

Give the camera person credit (your wife?) , She is on a slanted roof holding a camera, its ok that its slanted a little.

What kind of vent is that? Why would anyone cover it with rooftiles?

The brush and rods are right hand threaded. You CANNOT reverse the drill or they will disconnect!

Someone ran the dryer vent up to the screened attic vent and is against building code. You need to get a roofer out there to install the proper vent termination.

Once a year? The screen will plug up with lint after one or two months.

What you removed are low profile attic vents. They are not suitable for use as a dryer vent termination.

Seriously? First of all, a screen over a dryer vent is against building code. Secondly, the air is not venting properly underneath roof tiles. That will cause back pressure in the dryer vent system that could possibly force lint into the dryer cabinet. NOT GOOD!! That is the craziest damn thing I have ever seen regarding a dryer vent.