It works out better and faster, as the old saying  goes: "you get more with honey than vinegar". 

However I'm a friendly person by nature and have definitely found honey to work better than vinegar personally, while keeping very strict policies around the terms of the lease, rent collection, late fees, proper channels for maintenance requests etc.

Using the baking soda and vinegar trick lasted for a brief time frame but then the foul smell reappeared. 

If it were my home however, I would try a variety of things that I have now read about the last two days, such as pouring boiling water down the drain, vinegar, etc.

Vinegar is also pretty darn useful. 

You'll catch more flies with honey, than vinegar. ;)

As my mother was from Trinidad, West Indies and being raised in there, we tend to cook with curry (we curry everything LOL) and it does have a lingering smell (depending on the type of curry some are stronger than others) which can be offensive to others.When I cook curry nowadays, which is very rare to get rid if the lingering smell, the next day, I boil a small pot of water and vinegar which helps neutralize the odor.

Use white vinegar for cleaning porous surfaces such as woodwork, as it will kill down to the roots of some molds.

It doesn't smell and is only slightly visible now -- it's mostly the old stains I've previously had carpet cleaned coming back.I'm not able to replace the carpet now.I've tried vinegar with baking soda on it.

While it is still at the beginning, I can't help but think that by using some honey, instead of vinegar, with the long term tenant that was there, I will end up with two long term tenants and not many worries.