" wrote:

That filter is extremely clean. There is no need to mess around
trying to remove it.

If he wants to use it to vacuum up water there is.

He can still use it to vacuum up water - with the filter on. I've done
it.

Once you're done, just turn it upside down (like he has in the picture)
and let it dry out. Sit the whole thing on top of the outside AC unit
and let the hot air dry it out.