I have 4 year old boys whose aim isn't always true but for some reason I have noticed the loo really smelling of stale urine recently. I am cleaning it with Dettox spray every day and the fresh smell lasts for the rest of the day but by the next day it stinks again. Loo has laminate floor and am cleaning in loo, around outside and the floor. What's going on?! Are they just doing it every day??