You should be brushing and flossing your teeth every night.Please make sure you are at least rinsing your mouth with water after meals before inserting your aligners back into your mouth.
Clean your aligners by using the medium toothbrush specifically given for your aligners and scrub both aligners every time you brush your teeth (do not use toothpaste). Take special care to ensure this is done during your night time routine in order to combat the plaque build up from that day.
Areas to be cleaned: outside of the aligner, looking close at the joins between the teeth.Inside the aligners, looking at the surface which sits against the tooth PLUS inside the attachment wells.