I would mention to Tenant B that I was visiting Tenant A and smelled what seemed like marijuana smoke coming from their side and remind them there is no smoking permitted inside the house.

This tenant is violating the lease, and compromising the peaceable enjoyment of their neighbors' homes. 

Security Deposit: 2600Lease states no smoking/painting walls/no hanging things on wallsTenants have moved out and have left two truck loads of garbage to be removed.Damaged doorPainted walls which got on the ceiling and trim Lots of holes on the walls throughout the houseDamage from windows being left open constantly Weed was clearly smoked in the house (smell throughout the place) so we need to deep cleanWater bill wasn't paid so I had to turn back on utilityMissing keyQuoted costs:$450 junk removal (some furniture)$935 for damaged doors/windows, painting cleaning$30 for utility turn onTenants were only there for a year before moving out so a lot of this is beyond normal wear and tear. 

Often I can smell scents from the lower unit that aren't pleasant (cooking, smoking, etc).

I enjoyed reading about your first year of investing—it’s clear how much you’ve learned.

(Ok I get it that its 2024 and people smoke weed).

Like a tornado with a firebomb.....Holy Smokes!

Compliance items such as adding smoke detectors, hand rails, fire resistant garage entry-door and new stairs outside.

I believe they are expressing their displeasure with the fact that I have not accommodated some of their recent requests that went far beyond the scope of what is required (like insisting a licensed electrician switch out a smoke detector when we could do it ourselves) and I had to set some boundaries after years of high maintenance for them.

I just found a property that is on the river and seems like a place i would enjoy living.