I use Bleche White, or Mr. Clean.  Both are cleaners to start with, and don't really leave anything behind, like brake fluid will.  Neither is harmful to dispose of, or as toxic as oven cleaner.  Usually, I leave the parts soaking over-night, and use an old brush to scrub off any remaining chrome.  Keep the cleanser in a glass container, and change it when it stops stripping the chrome as fast as it had done before.