Drapery and Curtain Vacuum Attachment

Could be most useful.

I mean, you're not very likely to remove your drapes or curtains or whatever window treatments you have up and then take them in for cleaning.

From the website:

Drapery Vacuum Attachment

Safely whisks away dust from drapes, bedspreads and furniture — roller prevents fabric from getting sucked into the vacuum.

Fits most standard vacuum nozzle heads to rid curtains of dust, dirt, loose pet hair and allergens.

Durable, for years of use.

12-1/2 x 2-1/2".

Plastic.

$19.98.