Hello Trixie,
Thank you for sharing your experience with us regarding your Brea faucet. We'd like to go through some troubleshooting to help fix the problem you described with the handle leak. It sounds like the retainer ring under the handle could have come loose and may just need to be retightened. If this doesn’t resolve it, then the cartridge would need to be replaced. As the original purchaser, your faucet is backed by Pfister's Pforever warranty, which covers the finish and function for as long as you own it. Please give us a call at 1-800-732-8238 and we’ll be happy to send you the new cartridge at no charge under your product warranty and get this resolved right away.
Thank you,
Pfister