Nikwax has a new sample available - Nikwax Cotton Proof! Click the `Play the WebQuiz` button and register if you`ve never played before (log in if you have). Then complete the quiz with the correct answers to claim your free 100ml sample of Nikwax Cotton Proof! *If you`re unsure about a question click the `Clue` option on that question to get help with finding the answer You can only win a maximum of one free product per household every 2 months.