Waffles I think it depends on the taste (bought 3 flavors). also works better if you use 1 for each car door you want to smell. under the front seats doesn't work unless you open the windows to allow airflow through the car. I recommend finding a hiding place on each door (most doorknobs have a flap where you can stick it) - or my idea is to use double sided tape to stick it in places to hide it but it doesn't to block while buried under things or under them. - This is a more subtle and consistent lingering aroma. it will never be overwhelming. play long? Just take a look.
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