How to grasp rid those bathroom insects, contained by my bathroom ceiling? It looks similar to fruit flies....? It seems close to they are being trained approaching commandos. Initailly I used...

It seems close to they are being trained approaching commandos.
Initailly I used insecticide oil base as it works for a while after which It became immune to the insecticide. Then I started to use the bleach to verbs the area it works for a while and they become immune to it again and started to come back.
I necessitate advise. Thank you
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Answers:    Did someone read out ceiling?

Just get some bug spray, and I don`t know have a glass open when have a bath shower. The insects are attracted to the mould and humidity. You necessitate to ventilate the room!!