Midgets problems

Hello everyone, first time growing autos and i need help please, its growing in a mini greenhouse and out in the garden when sun out, im having problems with those little midgets flies, someone told me to spray water over it with a bit of washing up liquid, will that work you think?

Isn't it midges not midgets? Here's a link from a quick search for midges https://www.rollitup.org/t/worms-in-the-bottom-of-dwc-id-help.1035763/post-15894972

damn midgets