No you need to brush and floss. Mouthwash will help you with your bad breath you may have from not brushing. It will also help kill germs. However if you want to avoid getting more cavities in the future. You will need to just make the time to brush and floss. If you brush only two times a day then you are talking about 10 minutes out of your whole day. Add another four minutes to floss and you will see that you are only talking about 14 minutes. I am sure you can find the time. I know that ones life can get really busy but in the long run brushing and flossing will save you a ton of money compared to have to go to the dentist for filling, crowns, and root canals.