Try a good stainless steel tongue scraper. I promise you it works so much better than using the brush. I know some companies put a textured back on the brush in a poor attempt to make it a tongue scraper too, but those don’t work. This is what I use
Here you go, friend! I used to use plastic ones but now that I use a metal one I feel like my life has changed.
Get this one: https://www.amazon.com/Scraper-Medical-Stainless-Cleaners-Scrapers/dp/B07QRX886L/ref=sr_1_5
It's stainless steel, you get 2 for $10 and they will last forever.
You're not going to believe how much gunk is on the back of your tongue.
Honestly this might all be fixed by him getting a like $10 tongue scraper. They work better than brushing your tongue and have way less of a gag inducing problem
Here’s a link to the one my sister got because she nearly puked every time she went to brush her tongue
https://www.amazon.com/dp/B07QRX886L/ref=cm_sw_r_cp_awdb_imm_GY37GD1J257A6GM2022F
Looks like that model is unavailable. Here is a great alternative. 4.5 stars, 41K ratings.
like this I assume? https://www.amazon.com/dp/B07QRX886L/
this one seems interesting too I'll get it https://www.amazon.com/dp/B09VXHXTJC/
also, be sure to brush the white gunk off your tongue: that's the bacteria that cause bad breath. if you don't want to use a brush to get that nastiness off, you can use a spoon or a specialized tool for that.
only floss the teeth you want to keep! bacteria build up between teeth and cause bad breath and tooth decay. string floss isn't your only flossing option anymore: there are numerous different types of floss picks, and even the water flosser to turn flossing into a pleasure. make sure you use correct technique, otherwise you'll hurt yourself. practice makes perfect!
an electric toothbrush is cheap and will be one of the best investments you can make for your dental health. technique is always important.
whatever you pay for in dental hygiene, you'll gain a hundred-fold in dental health! preventative measures are always cheaper and easier to deal with than corrective procedures like root canals, teeth extractions, fill-ins, and dental replacements.