Go to another location.
I stopped into the Foothill/Topstop location for a frosty. 5 pm on a Saturday evening they had only one very young and unaware cashier. She chatted and chummed with a group of junior high kids - probably classmates. The order took over seven minutes for her to complete. I made the mistake of ordering toffee bits with the frosty. As she used the shake machine to incorporate the "mixins" I noticed that the plastic cover was encrusted with a thick and disgusting skin made from the splash of countless orders.
I then realized that the blender bit was being reused without even a rinse between orders - over and over again. I asked her if she was going to clean the blender before another use. She said yes, but did not replace or clean the blender and then made another shake - E coli yumm!