[RWebb]

you need to wear some protective gear - then you can track them with the spray can as they circle out further from you

also - don't get the long distance thin stream spray - get the short distance Phalanx air defense they got past my damn fighter wing spray...

I gotta tell ya tho - the sprays are neurotoxins - they are BAD for YOU.
but good for nasty teenagers....

one more trick - high pressure hose - spray them late at night and just food the H out of wherever they are

or... call a PROF. Exterminator. IF the things are way down inside your wall that is what will really be required anyway.

Amazing that such a small little thing can pack such a punch -- isn't Nature Amazing...