Quick and effective solution, you will never have problems in your grow again:
Step 1.
1 liter of water + 20g diatomaceous earth + potassium soap until it starts to bubble, it's better to mix with lukewarm water for a more homogeneous mixture.
Let it cool and spray the plant, the underside of the leaves is very important, don't forget it.
Always do this right after turning on the lights and move the light away until those leaves dry.
Repeat in 48 hours if there's a lot of pests.
Step 2.
Sprinkle 1 teaspoon of diatomaceous earth on top of the substrate, focusing on the plant's stem.
You can check your crops and see how effective it is.