Hi, oh the lovely thrips... three or four prong approach is best. And electric bug sucker/zapper trap works really nice, yellow sticky traps all over the soil and around, diatomaceous earth sprinkled on the soil, and an ipm regimen.
I use Dr Zymes and Lost coast plant therapy—- alternating. They are hard to get rid of and once you do...it fine until you buy more soil! My experience is the soil is tainted half of the time! The mini bug zapper helps a ton! Good luck. ✌️🏼❤️🌱