Drain fly issue
I had some drain flies start appearing at my kitchen sink for about a week. I did a vinegar and baking soda solution as well as multiple rounds of boiling water before and after. I covered the drains after the final round of boiling water. The problem now is that they are almost everywhere in the apartment. There are dozens in my bathroom now despite there only being 1-5 at a time in the kitchen. Luckily I did cover all my bathroom drains but I'm wondering if there's anything else I should do as I'm now worried they are going to multiply elsewhere.