Steven Dux

Support

Site running slow or lessons not playing

Work through these in order — the first two fix the large majority of cases, and both take under a minute.

1. Clear the site cache

The site keeps an offline copy of itself so it opens fast on a weak connection. If that copy gets stuck on an older release, pages load slowly, half-render or show outdated content. Resetting it is safe: it never signs you out and never touches your course progress.

Signed in? Reset it right here, or from My Account → Profile → Site performance.

Prefer doing it by hand? Hard-refresh with Ctrl + Shift + R (Windows) or Cmd + Shift + R (Mac). On a phone, clear the browser's cached files for stevenduxi.com and reopen the site.

2. Use a supported browser

  1. 1Use the current version of Chrome, Firefox, Edge or Safari 16+. Update it if you haven't in a while — old builds are the single most common cause of slow playback.
  2. 2Don't use the browser built into Facebook, Instagram, TikTok, Telegram or Messenger. If you opened your access link inside one of those apps, tap the menu and choose Open in browser.
  3. 3Test once in a private/incognito window with extensions disabled. If it's fast there, an extension (ad-blocker, privacy or "speed booster" add-on) is the cause — allow-list stevenduxi.com.

3. Network, VPN and data saver

  1. 1Turn off any VPN or proxy while you study. A VPN routes you through a distant country, and we can no longer serve you from the delivery point nearest to you.
  2. 2Turn off Data Saver / Low Data Mode (Chrome, Android, iOS Wi-Fi settings). It caps video quality and delays scripts.
  3. 3Prefer Wi-Fi over mobile data for lessons, and close other tabs that are streaming or downloading.
  4. 4Run a quick speed test while the problem is happening. Under about 5 Mb/s down, or over about 300 ms latency, video will need a lower quality setting.

4. Lesson video quality

The lesson player measures your bandwidth and latency and starts at the highest quality your connection can actually hold, then climbs if the connection improves. You can override it at any time:

  1. 1Open any lesson and look just below the video for Video quality.
  2. 2Choose 360p if it buffers, or HD to force full resolution. Your choice is remembered for every lesson on that device.
  3. 3Let a buffering lesson pause for 20–30 seconds before pressing play again — the player will have loaded a run-up and plays through cleanly.
  4. 4Course downloads (PDFs, spreadsheets) are served from the delivery point nearest you, so a slow download usually means the local connection rather than the file.

5. Device-specific steps

iPhone / iPad

Settings → Safari → Advanced → Website Data → remove stevenduxi.com. Turn off Low Power Mode and Low Data Mode, then reopen the site.

Android

Chrome → ⋮ → Settings → Site settings → stevenduxi.com → Clear & reset. Turn off Data Saver and any battery saver that restricts background activity.

Desktop / laptop

Hard refresh, then close unused tabs. If hardware acceleration is disabled in your browser settings, re-enable it — video decoding falls back to the CPU without it.

Still slow? Send us the details

So we can trace it from our side, include: your country and internet provider, the browser and version, the device, whether it's the whole site or only video, the exact page URL, and a speed-test result taken while it is slow.

Prefer email? Write to support@stevenduxi.com with the same details, or use the contact form.