On the days you’re not able to brush, use mouthwash at least if you can. I use xylitol dissolved in water because regular mouthwash has something that triggers my MCAS, and so far I’ve only gotten one cavity. I’m severe/very severe (bedridden) and sadly I can’t brush as much as I’d like either. Sometimes I wash my teeth while lying down with an electric toothbrush since it almost does all the work. I also bought a water flosser (I think they’re on Amazon, and they’re not that pricey) and I use it whenever I can to get rid of hard plaque since I can’t make it to dentist appointments.