Tomato fly trap

[Jungle Jane]

I brought my tomato plants indoors because of the weather. I noticed some tiny black fly on the stems so I squashed them but the plant catches these flies purposefully to eat them. The flies get trapped in the hair on the stem,it immobilises them & the plant waits for it to drop dead onto the soil surface. If the plant gets nutrients from the flies is it beneficial to the plant to leave these flies on there? Does anyone leave the flies on? I don't know what to do,but I could be damaging the odd hair on the plant when squashing the little flies? It might be better to leave them there?

[Scarlet]

I'd squish away! They may be beneficial to a plant in the wild but a tomato that is looked after in the GH has little need for something decomposing in the soil. Most creepiest are too small to decide whether they are friend or foe so anything that moves in my GH usually gets splatted except ladybirds.