Well, I didn't get more flies in when I opened the door but those that were already in didn't all rush out either.
But what's this?
Is it a dust buster? Ghostbuster? Or could it be ... ... a fly buster! With a bit stealth - it has removed all the flies that were already in AND the cloves are stopping more entering - so I'm a happy girl again!
Now I really must get back to blogging about birds and poetry....