Retainers!

My braces have been off since August and now I’m wearing clear plastic retainers. They get so nasty throughout the day, no matter how many times I rinse them off (I actually clean them morning and night, but rinse them throughout the day) All the saliva makes them look and feel gross. I hate them. Every now and then, it cuts into my gums and makes sores. Does anyone have the metal hawley retainers? I’m thinking about asking the dentist in a few days if I can get those instead of these plastic ones. If you have the metal ones, can you please tell me how they are! What are the pros and cons?