This is a weird topic, wonder if any bro or sis can help. I just finished my reno (4-rm resale) 2 months back but have not moved in yet. I usually go over on weekends to move stuff or tidy/wash. So I always have my windows closed, and toilet covers down (because scared dengue etc). But since a month back, I keep discovering these dead flies in the common toilet, inside the toilet bowl. The master toilet is fine. Any idea how they get in the covered toilet, and how to get rid of them permanently? (on mobile, not sure if my pic uploaded correctly)