What causes gnats to be in the house?

Related questions

1. Are gnats attracted to humans?
2. How long does it take for a gnat to die?
3. How do I keep gnats away?
4. What gets rid of bull gnats?
5. Where are the gnats coming from?
6. Why are gnats attracted to me?
7. What are gnats attracted to?
8. Why do gnats fly around your eyes?
9. Why are gnats so attracted to me?
10. How do I stop gnats from biting me?

Tags

1. #moist
2. #around
3. #under
4. #gnats
5. #kitchen
6. #following
7. #spillage
8. #vents
9. #grounds
10. #potting
11. #plants
12. #causes
13. #inside
14. #include
15. #overwatered
16. #garbage
17. #pipes
18. #house
19. #breeding
20. #outside
21. #windows
22. #leaky
23. #grass
24. #moisture
25. #condensation
26. #puddles