Possible Clues:

• Clue for 'Liquid' requires it
• Key like this I found in town
• Liquid mixture you are seeking
• Key mixture
• What you want here is something involving less concentration
• Louis not prepared to give answers
• Answer could be a blend of liquids, perhaps
• Something watery is what you want here!
• Explanation given by Louis, not unexpectedly
• Your aim: correct this!