Sound like you live in the states but one thing I’m doing to keep costs down at the moment is cycle everywhere whenever I don’t need to get the train or car. It’s 7.20 return to use the metro whereas cycling is free. Savings Adds up quickly.

They did a month of measuring a toothbrush for bacteria and found no real change after 30 days of using and flushing

This was disproved on mysthbusters