To remove loose particles from your Valplast appliance, you may want to consider using a Sonic Denture Cleaner rather than brushing. Brushing Valplast material will scratch up the surface, leaving a dull appearance and making the appliance susceptible to staining. Sonic Denture Cleaners from Valplast International Corp. run on two (2) AA batteries and will safely and effectively remove loose particles from your dental appliances. Be sure to add a Sonic Denture Cleaner to your next Val-Clean purchase!