Quick Answer

To replace brush heads on your Oral-B iO9 Twin Pack, simply pull the old head straight off the handle, align the new head with the metal shaft, and press firmly until it clicks into place.

Why Proper Replacement Matters

Using a worn or incorrectly installed brush head reduces cleaning effectiveness and can damage your toothbrush. The Oral-B iO9 uses a precision-fit connection that requires a clean, straight push to seat the head correctly. A loose head may vibrate excessively or fail to oscillate properly.

When to Replace Brush Heads

Oral-B recommends replacing brush heads every 3 months or sooner if bristles become frayed. The iO9 handle has a built-in reminder: a light on the handle will flash or the brush head icon will appear when it's time to change. Ignoring this can lead to plaque buildup and gum irritation.

Step-by-Step Brush Head Replacement

  1. Remove the Old Brush Head: Hold the handle firmly and pull the brush head straight away from the handle. Do not twist or wiggle it side to side, as this can loosen the internal seal over time. If the head is stuck, rinse it under warm water for a few seconds to loosen debris, then pull again.
  2. Inspect the Metal Shaft: Check the metal drive shaft on the handle for any debris, toothpaste residue, or damage. Wipe it clean with a dry cloth. A dirty shaft can prevent the new head from seating fully. Never use sharp objects to clean the shaft; they can scratch the metal and cause corrosion.
  3. Align the New Brush Head: Take a fresh Oral-B iO replacement head and align it so the bristles face the same direction as the brush handle's front. Slide it onto the metal shaft until you feel resistance. A common mistake is forcing the head on backward — it should slide on smoothly without excessive force.
  4. Press Until It Clicks: Push the brush head firmly onto the handle until you hear a distinct click. Give it a gentle tug to confirm it's locked in place. If it slides off, it wasn't fully seated. Running the brush briefly in your hand can confirm the head doesn't rattle or wobble.

Product Facts

  • Oral-B iO9 Twin Pack, White Alabaster + Aqua Marine: Over 24 million Oral-B electric toothbrushes sold in the US The widespread use means replacement heads are easy to find and the system is well-tested for reliability.

    Oral-B iO9 Twin Pack, White Alabaster + Aqua Marine

    Oral-B iO9 Twin Pack, White Alabaster + Aqua Marine