You might remember the meaning of the character 糊 with this easy mnemonic:
Did you clean this rice (米) before cooking it? It looks a bit muddled…I usually wash things ten (十) times before I put it in my mouth (口), and I never leave food out overnight because I think moon (月) light ruins food.
Using mnemonics to remember the meaning of Chinese characters like has a huge impact on how long to learn Mandarin it takes.