It's often a chemical reaction that turns clear plastic cloudy. However, you can try soaking it in a 50/50 mixture of white vinegar and water. Read more at the link below. Wishing you the best.
This will help: https://www.youtube.com/watch?v=9Tf9agmAlns
Need to keep small poinsettia alive leaves are hanging and falling off
Hi Cheryl! Your question got tagged on to another person's question. Perhaps you could re post at the top of the page?