There are multiple locations to have to fix under the carpet, I think you may have found and cleaned one location, but you have another location with corrosion under the drivers seat carpet. Pull the seat out again, you may have to cut some of the carpet to do proper inspection. Take your time, I think you will find the corrosion in a second junction point under the carpet.
There is a picture in this thread that can show a corrosion point:
No electric to any door except driver, floor soaked in water