I had a small gnat problem and I bought two CP's (carnivorious Plants), a Sundew and a pitcher plant. The problem was taken care of in one day. Sundews are helpful for spider mites and pitcher plants more so for gnats. If the problem persist, I would buy some spray but do research before you buy it.
i always clean my room after every grow (javax in a spray bottle ) then i give it a quick spray before a replant , i have a buddy that uses a sulpher burner before and after ,and it seems to work real good ,,a clean room is a happy room ,,,
1st off welcome to the site. pests and bugs are brought in mostly by the grower. this is mostly caused from your pets. bugs and pesta live in your yard and every time your animals go outdoors the pests hitch a ride indoors. now you love and pet your loving companion and now they are crawling all over you. then when you enter your grow site wow they have took up home in the nice warm climate. 2 things you can do to prevent this from happening or strait getting outof control is 1stshower and change clothes b4 entering , or 2nd mix up a spray bottle of water and bleach. 25% bleach and 75% water and mist your selfb4 entering.