2020 answer to a 2019 question:
1st. Spanish Cedar is native to Central and South America. It's not a "true" cedar but people call it that. It's
Scientific Name is Cedrela odorata and it's a type of mahogany.
2nd. This wood retains a certain amount...not a lot...but a minimum amount of moisture. Being fantastic for humidity, releasing some humdity, but not rotting. It has a mild and distinct odor that enhances cigars and repels insects.
DO NOT use North American cedar anywhere near cigars!!! North American cedar does repeal insects, repels rotting but gives off a VERY pungent cedar odor that will destroy the aroma and taste of cigars.
North American cedar is great for stuffing in dog bedding but not cigars!!!
3rd.
DO NOT: Soak a cigar nor it's tip in alcohol or soak any humidification for cigars in alcohol.
THE only alcohol your cigar should touch is the residue left on your lips from drinking bourbon(or your favorite drink with cigars) while smoking a cigar. Soaking or any such of the thinking of alcohol infused or touching a cigar with alcohol...think of this...
Do you pour flavored Kool Aid in you beer or wine to enhance it's flavor???
4th. The cedar in the tube helps with humidification. Remember in #2, when I told you it retains a small amount of water but resists rot. With a tube/tubo....if your going to leave it ONLY in the tube...take it out and put the cigar in a humidor. That little sleeve is only in there to help...not maintain humidity for a looooooooooong time.
5th. The cedar sleeve can be used to light the cigar. Remember in #2, when I stated it has a mild odor...well it can be used to light cigars and DOESN'T impart negative flavor.
Example: Say you only have a zippo with
LIGHTER FLUID in it NOT Butane. Lighter fluid will make any cigar from a Swisher Sweet to a Cohiba Behike taste bad. That boys and girls is why we use BUTANE...not lighter fluid.
Or if you don't have sulfur free matches...true cigar matches DON'T have sulfur..or a very minimal amount, not like regular matches...you can light the sleeve and use it as the lighter.
Just my 2 cents