ホモテナシ

When pouring cold water into the 釜（かま） or left-over hot water, make sure not to handle the 柄杓 like an oil seller. That is:

• don't shake off the last drop of water
• don't lift the 柄杓 while pouring

This is called 油柄杓（あぶら　ひしゃく）, which means oil ladle.