Mouthwash (WITH alcohol) daily almost completely eliminates the need for daily brushing and flossing. This was later retracted by demand of the ADA to only say "as good or better than flossing"; from here: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3894074/ "mouth rinses would be considered to be “at least as good as” daily flossing if the upper limit of the 90% confidence interval" there are a number of studies on this topic and they all seem to generally be in agreement. Mouthwash even once a week is really good for dental hygiene. They make alcohol free mouthwash but it's hard to argue with the antimicrobial properties of alcohol and the price difference is neglible.