Hi there,

Thank you for sharing your review, and we're sorry to hear that the performance of your Philips Sonicare 4100 Series is not as expected.

Please follow these instructions while brushing. Wet the bristles of the brush head. Apply a small amount of toothpaste (the size of a pea). Too much toothpaste will create excessive foam that will run down the handle. Place the bristles against your teeth at a 45° angle towards the gum line, and close your mouth around the brush head (to prevent spattering while brushing). Press the power button to start brushing. Apply light pressure and move the brush head slowly across the teeth in a small back and forth motion, allowing the brush to do the work. Continue this motion throughout your brushing cycle. Your toothbrush has a Quadpacer feature; you can divide your mouth into four sections. The Quadpacer will vibrate intermittently to tell you to move on to the next section. Clean your toothbrush after use by rinsing your brush head and bristles. Wipe the handle with a damp cloth.

If these instructions do not help or if you need any other assistance, please reach out to us via social media. We are available on Facebook (@Philips) and X (@PhilipsCare). If you do not use social media, you can also reach us through the contact page: www.Philips.com/contact.

Kind regards,
Philips Consumer Care