Then we are going to feel MUCH better about trying to help them.The unfortunate part is that Tenant's of all kinds (some of which are Landlords TOO) smell free stuff and they start grabbing for it.

. - Put down a copper slag infill to help reduce the pet order smell and future cleanliness.- If you go with concrete pavers, install a solid 4"-6" of road-bock base, don't cut corners on the foundation, it will save you in the long run.

Global demand for goods has and will continue to diminish as the world tries to battle and then recover from COVID.

The smell is a strong mix of chlorine and oranges , much better than before . 

It was a battle.

The house smelled heavenly. 

If they move out and you discover the smell, charge them for the cleaning and deodorizing.

The contractor suggests duct cleaning that we'll do anyway, but I was wondering if anyone has had a similar issue like ours and could provide additional info on the questions below:- some additional info re reason of the smell (what kind of bacteria is it?)

If they don't change the fridge's water filter, the worst that will usually happen is they'll probably end up with funny tasting/smelling water.I have another lease that's a custom lease written up by an attorney, and has a clause that specifically addresses HVAC filters:AIR FILTER REPLACEMENT AND/OR MAINTENANCE RESPONSIBILITY [Landlord check this box if applicable]  The premises is supplied with a replaceable air filter as part of the HVAC system.

This is something I have been battling.