Well, if you have to hit each one, it seems just as easy to squish them.

" Well, if you have to hit each one, it seems just as easy to squish them. "

Help yourself! LOL!

Not sure what the coffee contributes to the mixture... I've used a similar formula for years, with just purified water (hard water tends to clog the sprayer). I also add rubbing alcohol to mine, it paralyses the bugs long enough for the soap solution to do its work. It works wonders on squash bugs, aphids, and ants, but you do need to cover the entire insect for it to work.

Soap solutions make great low-toxicity bug killers, but soap & oil can cause leaf burn on some vegetables. Using a potassium-based insecticidal soap (such as Safers) will reduce the likelihood of damage. If dish soap is used, you can rinse the leaves off after the bugs are dead, maybe 15 minutes after application.

Alcohol and sand. Alcohol makes the drunk and they will get in a fight and stone each other to death with the sand.