Hot, soapy water plus vinegar is my go-to solution to this. Vinegar is one of the most wonderful and underappreciated cleaning products in the universe, as far as I'm concerned. I also wash my bowl, beaters, spatulas and storage containers in it when I'm doing anything with egg whites, like royal icing. And then I clean my floors with a vinegar-and-water solution after a long and messy session of caking. The best!
I use a small sauce pan and a strainer.
1. Boil tips and couplers in water.
2. Dump in strainer, rinse and add more water, bring to a boil again.
3. add 1 or 2 drops dish washing liquid. Keep an eye on this, it will boil over quickly.
4. Rinse thoroughly, add more fresh water and bring to a boil again.
After it comes to a boil, strain and right away, sit on a few folded paper towels to dry.
The heat dries them almost instantly.
I do this as I am cleaning up my mess. It get's all the butter cream out of the tips of the smaller pastry tips, and keeps your pastry tips grease free. Grease free means germ free!
*This cuts the grease and keeps your couplers very white.
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