We've used odour-busting products like Febreze before, but to be honest, we've never liked the strong scent it leaves after spraying (especially in smaller spaces or in our car). We already use Zeolite, but there are surfaces and situations a spray solution comes in handy. So now we're using a naturally derived solution we found at the aisles of Nijiya Market on Sawtelle labeled as ND-101 . Made of extracts from pine, camelia and oxalis, all Japanese native plants, the concentrate is diluted before use at a ratio of 1/ teaspoon per 10 ounces. Despite its strength, it barely smells with just a hint of perceptible pine odour (which we prefer over the artificial scents most air freshening products over do).
We've used it thus far in the car and also in the room where we keep our cat's litter boxes. In both cases we noticed a marked improvement, and there's none of the annoying lingering chemical smells. Give it a try if you're looking for a natural alternative...we're glad we did.