I agree with wingedwolf. That really isnt too high. Maybe not ideal for long term but its not going to hurt your BP. Low humidity will cause more problems than high humidity. It wont drop very fast if you make small changes. Just try a much smaller and more shallow water bowl. Wait a day to check it again. You dont want to risk dropping the heat too low while trying to get the humidity lower.
Oh and for bowls, do you have a Target store by you? They have plastic dog/cat food bowls in different colors and sizes which will not tip. Small ones are about $2.00 and are not likely to break or crack like the dollar store ones.