How long do you tumble loaded pistol rounds to remove case lube?

[ReloaderRoss]

I use Midway spray-on case lube or Dillon spray-on case lube which is made with LANOLIN and will not degrade the powder. I normally do NOT tumble the rounds after reloading, and have had ZERO problems in any caliber with this. However, I do have friends who want to remove the slightly tacky case lube prior to storage and, for lanolin based lubes, they use a terrycloth towel moistened with common Rubbing Alcohol and roll the rounds on the towel. Alcohol evaporates, and .... voila.