Frequently Asked Questions Taking care of my Nutri wonder plate covers It is very important to ensure that the Nutri wonder plate covers are kept in good condition. Use within 3 months Once you open the packaging of the covers, make sure you use them within 3 months. Cleaning the covers Clean the covers with a damp cloth after every use. Make sure the plates are completely cooled off before you start cleaning them. Dispose of properly Used Nutri Wonder plate covers can be disposed of with your normal household waste.