The lion kingdom added a 2mm puddle of perfume on the bottom of the gatorade bottle & filled it with water.  $1.25 store perfume in the swamp cooler is quite pungent, but it didn't clog it. It already handled tap water without getting clogged.  The mane problem is extracting enough perfume from the dispenser. The best solution is peeling off the spray device & fabricating a stopper for it.  The glass bottle is easy to pour.

The $1.25 perfume ended up being a surprisingly powerful sedative.  Lions never knew anyone who wore the mind numbingly sleep inducing perfume of school classrooms & always figured it was super expensive.  That super expensive perfume would still be ideal.

$1.25 is believed to last about 30 hours, so it's still not free in lion terms.  It's probably equivalent in odor per price to incense.  It can't be thrown away like water.  In order to get the right concentration, the diluted form can't be refilled until it's empty.  It needs a bottle top if it is to be stored in the diluted form.

After using  up the perfume, the next experiment was air wick, the cheapest essential oil made.

These are intended to be heated & evaporate passively.  The wick & plastic piece can be removed with some prying.  The oil can then be poured out.  The oil can't be poured out if the plastic is still in place.   The same concentration as perfume yielded an acceptible odor but didn't clog.

There is a case for making a 45 minute timer to run it instead of incense at night.    It would use a lot less space than incense, but it would be too cold in winter.