# Search the Help Center

If your guest link isn't behaving as expected while you're setting up or testing, try these steps in order:

1. **Confirm the link hasn't expired or been deactivated.** Links may expire or be disabled from the Customer Platform at the conclusion of a project.
2. **Confirm you're using a [supported browser](/content/help/preferred-browser/index.html)**
3. **Use a separate private/incognito window per link you test.** This is the single biggest fix when testing studies with multiple guest links — your browser can hold onto an old session and keep showing you the same survey no matter which link you click next. Instructions for your browser:
   - [Google Chrome (Incognito)](https://support.google.com/chrome/answer/95464)
   - [Safari (Private Browsing)](https://support.apple.com/guide/safari/browse-privately-ibrw1069/mac)
   - [Mozilla Firefox (Private Browsing)](https://support.mozilla.org/en-US/kb/private-browsing-use-firefox-without-history)
   - [Microsoft Edge (InPrivate)](https://support.microsoft.com/en-us/microsoft-edge/browse-inprivate-in-microsoft-edge-cd2c9a48-0bc4-b98e-5e46-ac30f6d6ac06)
4. **Know what to expect from studies with multiple guest links:** by default, a single guest link may randomly serve one of several survey variants — it is not currently possible to guarantee which variant a given guest link shows without a custom setup. If your test plan requires guaranteed per-variant links (e.g., you need controlled completes per variant), contact support to have them manually configured for your study.
5. Still stuck? **Contact support with the study link, the guest link URL(s) you're testing, and whether private browsing is an option on your network**.