i would stay away from putting any kind of alcohols or chemical in your attys. i have a great way to clean your carts and attys.
everyone has their own way to clean thier carts, and many just rely on watching youtube for information. so i guess this will be a quick case of TV killed the radio star. but i thought i'd share with you the way i clean my cartos and atty's.
first off, boil yourself up some water in your kettle and pour into a bowl or small rock glass.
step two, pull off the cap and pull out the silicone "o" ring inside your cart. if there is still juice in your cart extract it with a syringe. find yourself a non hypo syringe, the type to administer oral medicine. or you could just remove the hypo from your existing syringe and attach the "o" ring to the end like so.
third, plug in the "o" ring into your carto or atty and draw in boiling water, then plunge back out. repeat this step for however long you desire always changing to fresh water before finishing. blow out any excess water from the threaded end and put them out onto paper towels until you believe they are dry enough for use.
hope this helps, thanks for reading. ~ChRiS