I ordered the angel bottom balm from Earth mama angel baby and was surpised at how teeny the jar is, I thought I must have ordered the small one by mistake but when I went back on the website I realized that the 2oz jar is the largest they sell! Its TINY. I'm wondering for those of you who use it, how fast do you go through a jar and do you only use it if your baby has diaper rash or do you apply it after every diaper change?