Nick is attempting to develop a new plastic for his chemical company. He hypothesizes that mixing chemical A with chemical B will produce a super-strong plastic that is better than any plastic on the market. Nick places chemical A and chemical B in a beaker and does the experiment. To his dismay, the mixture explodes into a huge purple mushroom cloud, leaving behind an oily, foul-smelling liquid. Nick does this 9 more times and gets the same result 9 times. Finally, Nick rejects his hypothesis. Based on the scientific method, what should Nick do next?