no that temp is fine and so is the humidity.. but the plant is not FINE : (

I like stupids suggestions regarding spring wate.. I'd go a step further and transplant and use distilled water...

You got to get that plant out of that container.. it is haveing some aversion to the nuts in that soil.. you need a bigger pot... and not a soda bottle... lol .. nice try..

any big container will do.. shit, if all you have is 5 gallon pots, go 5 gallons...
see if you can get a bag of perlite to mix with your new soil.. perlite is 3-4 dollars for a big bag.. mix that with the soil.. 30% perlite 70% soil...

oh yeah.. and stop spraying the leaves.. bring everything to a hault.. just plain distilled water in some new soil.. let her get stable