Re: Km vase cleaning help.
If it's calcium deposits, you could use OxyClean, Cascade Complete, or CLR. Just clean it out really well afterwards.
If it's just a build-up, use 90% ISO Rubbing Alcohol mixed with salt (table or epsom). Shake vigorously! Works even better if you warm the ISO in the microwave. Just microwave it in 10 second increments until desired temperature.
Between the two of these, you should be able to remove any kind of gunk.