Will start by saying they are generally good kids. Both work and are at uni and we have a good relationship most of the time.
Dh and I have had petty arguments over the years as he feels I still do too much for them... They don't really do chores as such and I don't charge any digs etc. We still pay car insurance/phone contracts etc as they are both in full time education living at home so their part time jobs is their own money. They are good at helping out with younger dc if our shifts clash and will help in the house when asked so not all bad.
A few months ago I found weed in oldest dc car (20) i obviously wasn't happy but dc insisted it was to help out with anxiety (which she does have history off) I told them that I wanted it stopped due to health reasons and thought it had!
Today I've found a vape in dd2s washing (18) I've taken it off them and told them it stops now and I'm getting it thrown back in my face that dc1 still smokes weed behind my back and at least what they're doing is legal etc!
To be honest I'm feeling out my depth about this, I'm putting my foot down saying I forbid them to do this but feeling like what's the point when it's so easy for them to go behind my back and carry on 😣