The dish cloth is dirty — remember to swap in a new one.
Tips
memory
Read it as a recipe: 擦 (wipe) + 碗 (bowls) + 布 (cloth) = bowl-wiping cloth. Many household-item compounds in Chinese work this way: 抹布 (mābù, rag), 围裙 (wéiqún, apron), 桌布 (zhuōbù, tablecloth).
