Please choose the correct solution to the question: To get rid of toilet bowl stains.

Solution1: Pour a can of condensed milk into the toilet bowl, and let it sit overnight. Then wash it with soapy water, and flush clean.

Solution2: Pour a can of Coca-Cola into the toilet bowl, and let it sit overnight. Then wash it with soapy water, and flush clean.

Answer format: solution1/solution2
Answer: solution2