On Wed, 23 Dec 2020 11:54:13 +0000, wrote:

If it's only used rarely, a chimney balloon is the thing, looks
like an
inflatable pillow.

Discounted because of storage, crud and size

Storage - a ballon deflates, deflate, shove it in a bag.

Crud - Is going to fall down anyway. At least with a balloon you
know when it's going to.

Size - See storage and surely with a little used fire place "storage"
is up the chimney. B-)

--
Cheers
Dave.