There are many options that kill bugs. Peroxide, Isopropyl alcohol, vinegar, and bleach all work at 10% dilution yo 90% water. I’ve heard people mention much higher concentrations, but I haven’t used them myself.
Neem works well in the vegetative stage, but should never be sprayed on buds as I’m sure you’ve read from others.
Pyrethrum can be used in the budding stage, but is very hard on plants as well as pests.
Personally after my first spider mite disaster, I inspect any weird looking markings on the leaves daily, and spray plants weekly with 1 tsp Neem, 1/2 tsp liquid dish soap, to 1 litre of water through the entire veg stage and into the bud stage as well until you can see pistils.
Once your plant starts showing flowers your choices are much more limited if you want to produce something healthy for yourself. When I was trying to just get my plants through flowering with an active infestation, I used peroxide only, every 3 days to keep the numbers down. It’s almost impossible to get rid of them while your room or tent is still full, just too many places for them to hide.
If you’re in between grows then it’s perfect timing to disinfect everything, a minimum of three times.
When I was finished the disinfection process, I put a test plant into the space by itself for a week as bait 😂 just to be 100% sure the issue was gone. Inspected it from stem to stern... then reluctantly moved other plants in.
I’m only on my second indoor grow, so I’m sure you’ll get answers from more experienced growers that have a lot of great insite. This was my experience tho. Take it for what you willðŸ‘