17 year old siblings dont flush

[buttonfloof]

My two 17-year-old sisters consistently and routinely never flush the toilet. I've asked them numerous times in a friendly and joking tone to give a courtesy flush. Its gotten to the point where I'm convinced this is a quirky form of psychological warfare designed as a way to piss me off. Almost every day I have flushed the toilet between 1-3 times for them for as long as I remember. How do I get them to stop??? Am I too uptight about this??

[Wiseman2]

49 minutes ago, buttonfloof said:

 Its gotten to the point where I'm convinced this is a quirky form of psychological warfare designed as a way to piss me off. 

Do you all live at home with your parents?  Talk to your parents about the problem.

[Cherylyn]

Leave a sign that says:  "Please flush the toilet.  Thank you." 

I agree, talk to your parents. 🙄