If McDVoice isn’t working, there could be several reasons, such as technical issues, expired survey codes, or browser compatibility problems. First, ensure you’re entering the correct survey code from your McDonald's receipt. Try clearing your browser’s cache or switching to a different browser. If the issue persists, check your internet connection or visit mcdvoice.com survey later. Some surveys have participation limits, so confirm eligibility. If problems continue, contact McDonald’s customer support for assistance. Keeping your receipt handy will help resolve issues faster. Participating in the survey allows you to share feedback and receive potential rewards.