How can I troubleshoot DNS resolution issues when using Cloudflare DNS?

Troubleshooting DNS issues with Cloudflare involves several steps. First, use tools like `dig` or `nslookup` to verify that your DNS records are correctly configured in Cloudflare. Check Cloudflare's DNS health checks. Clear your local DNS cache. If problems persist, temporarily bypass Cloudflare (using the 'DNS only' mode) to see if the issue lies with Cloudflare or your origin server.