Unable to log in to local site admin

I’m working on my new site locally using MAMP. It worked fine for a while, and still shows up OK when I go to localhost, but I’m no longer able to log in to admin. I checked the wp-config.php top make sure the database, user & password were set correctly and checked the database to make sure the user had all permissions and the password was set there. However, when I try to log in, it says the password is incorrect.
I also tried emptying the browser cache.
At this point I’m out of ideas. Any thoughts other than dumping it and starting over?
Thanks for any and all help.