I don't have that problem.  There are several openings, but sealed.  Have
you or a previous owner removed the rear heater?  mcneely

On Sat, Jun 24, 2023 at 7:54 PM Jeff Palmer <w.jeff.palmer@icloud.com>
wrote:

> Why is the storage underneath my Westfalia back seat always dusty? Where
> is it coming from??
>
> Thanks
> Jeff
>
> Sent from my iPhone