Referencing

Hi

I wonder if anyone can me advise on referencing

I have two young ladies in my house who

1.Pay up on time

2.Keep the place reasonalby in order and allow me access for any repairs

However

They aren't very clean

and recently damaged the vacumn cleaner by not clearing out hair

blocked shower by not clearing out hair and have worn away shower tray trap by putting corrovise chemicals down it

They are now thinking of moving out and want reference


How do I word it alerting the next landlord that these ladies are okay but lack common sense and have never been shown how to clean things or have no idea how to clean properly

Any advice appreciated

Thanks