On my daughter's A1, both footwells get a significant amount of water pooling after it rains.
The car does not have sunroof and the boot area is completely dry.
I removed the scuttle and cleaned the area below, then poured a couple of buckets of hot water down. Checked the footwells after that and they were dry. However, after a couple of days of rain, back to square one.
My next option is to check whether the rain could be leaking in via the doors. On a previous BMW with a similar issue, the problem was the plastic sheet behind the door trim had come loose, but I believe the Audi A1 does not have this sheet.
Any thoughts on a way forward?