If you are truly struggling and need actual dental care, try searching for a local dental school near you. Many will take patients for cheap or free, with the caveat that a dental student will be performing the treatment.

Otherwise, brush at least twice a day and floss. Do not re-use strands of floss, like with those convenient plastic picks. You’ll just be transferring bacteria to each crevice after it’s been used.

Get a water pick (whatever it’s called) - I heard those are great but I don’t have one myself.