Butter doesn't clean off of silverware very easy. Every time I finish buttering bread, I'm left with a knife covered in butter which needs to be cleaned. I can't just run it under the sink unless I wait for the hot water to work its way through the house. I don't want to waste a whole paper towel for the job.
So far I've been ripping corners off of paper towels to clean the knife without being wasteful. Is there a better way to clean butter off of a knife?