Dr Doom 3 in 1 is just extremely expensive canola oil.
You need to make contact with the pests when you spray it as the way it works they need to be coated in it. Bugs that come along after it's sprayed may not be affected by it as you've found out. Neem oil would be better as it is unappealing to bugs that come along after it's been sprayed on leaf surfaces and they'll go somewhere to find a meal that tastes better. Sesame oil is also a good oil to use as a deterrent.
Reading the label of Dr Doom it's 96% canola oil. The other 4% is going to be a stabilizer and surfactant. You can mix it yourself with some store bought canola oil and a few drops of soap. You can get 48 oz bottles of canola oil at the grocery store for under $5 vs $25 for a quart of Doom.
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