We're sorry to read about your disappointment with Scotts Grubex1 Season Long Grub Killer and appreciate your feedback.
Scotts Grubex1 Season Long Grub Killer only controls listed white grubs and will suppress chinchbugs (does not provide complete control for chinchbugs). Grubex is not effective on mature grubs. Larger (mature) grubs are harder to control and resistant to most controls on the market. Grubex needs applied as a preventative in spring or early summer before damage is present, once damage is noticed it is too late. The active ingredient needs watered into the soil before it is affective.
We want you to be confident in our products. For this reason, we offer a product guarantee to our consumers. At your earliest convenience, please reach out to us at 877-220-3089 if we can further assist.