On Sat, 11 Jun 2016 00:27:04 -0400, Ed Pawlowski wrote:

Last week I bought a can of insect spray. I notice on the label it
states "Kills Up To 4 Weeks"

http://www.hotshot.com/products-and-...ng-insect.aspx

After the four weeks is up will my house be invaded by the formerly dead
bugs? I want a spray that kills them forever.

What that means is that You will kill 4 weeks trying to get the spray
to work. Get back to us on July 10th.