I recently tried out a bottle of Pat's Trains new Smoke fluid in Vanilla Scent.
It came in one of three sizes, of which was the small 2 oz bottle.
Upon utilizing in two different locomotives (MTH Premier and 1965 Lionel Scout), I am happy to report that this smoke fluid is very very very good.
I noticed there was no messy residue, and the vanilla scent was not overpowering, yet just enough potency to make a pleasant scent in the room.
Smoke output is good too and easily matches or exceeds the smoke fluids that came with my engines.
My wife who has bad allergies and hates air freshener's actually seemed fine when she smelled it while standing in the door way.
My dogs like it as well, two Siberian Huskies who already come blazing into the train room when they hear the trains running, now go completely nuts sniffing the air.
Thus, all of this and the great prices and service at Pat's Trains, makes these new smoke fluids a winner in my opinion.
Pat's Trains has a great website too! With easy online ordering!