m0useanswered grow question 9 months ago Looks like mite damage to me but with out any webs prob thrips.
Look on the under side of the leaves as you will see mites there if its them. they are crazy small might need a magnifying glass.
The trips tend to also hang out on the under side but sometimes the upper. The ones I get are always yellow not the typical black ones and they chill on the main vein of the leaf and hard to distinguish them vs the plant if they not moving.
If your just going into flower I agree with just soap "dish soap" and water. Get it really frothy and coat the plant then rinse off with the hose. Can add in a bit of baking soda to increase the PH of the water, makes it less tolerable to insects and fungi and it will help it froth.
1Gal water + 1tbsp dish soap + 1tsp baking soda = spray on, let sit for 30min rinse off. DO NOT DO THIS IN FULL SUN. move the plant to the shade or wait for an gloomy overcast day if in the earth and can not move it. Or really early in the morning or later in the evening.
Good Luck!