I use a dollop on the end of my index finger. It's a bit bucket and shovel but you will soon be able to judge the right amount. I was told to make a sachet last 10-14 days and nearly always get 12 or 13! To store, slide a paper clip sideways across the open end, or fold top over and secure with paperclip, and store upright. I apply to inner thigh, alternating legs.
JP x