Mosquitoes breed in water and bite people.

I think you have fungus gnats. Very little, black flies that get into everything? To get rid of them, put 2 cm deep of clean white sand in your soil. The gnats cannot get to the soil to breed and they die. The adult gnats can also be caught with sticky fly traps- resin and mineral oil on a spiral of paper. The white sand also reflects the light back to your plant!- Granny