Fat banana and mimosa

First proper week and not all is well with this grow. When mixing the biobizz worm castings into the soil mix, I noticed some small flys but thought nothing of it. It looks like the worm castings were infested with fly eggs and they’ve been hatching over the last week due to the warmth from the light. They’re not attacking the plants but I’ve added a few grapes which they’re enjoying, so a few times a day I kill them and repeat. Not sure what else I can do other than start again. I’m going to leave them for a few weeks and see what happens. Ah well. 🤦‍♂️