Philips Electric Toothbrush Sonicare DiamondClean Smart
Experience unparalleled oral care with the Philips Sonicare DiamondClean Smart Electric Toothbrush, model HX9903/15. This revolutionary device combines cutting-edge Sonic technology with a sleek black design to elevate your daily brushing routine. Designed for complete oral hygiene, the DiamondClean Smart delivers up to 10x more plaque removal and 100% more stain removal in just three days, ensuring your smile is bright and healthy. With four customizable brushing modes and three intensity settings, you can tailor your cleaning experience to match your unique needs. The built-in pressure sensor alerts you if you're brushing too hard, protecting your gums while improving overall gum health up to 7x in just two weeks. Plus, the intelligent brush head mode pairing technology ensures you're always using the perfect brush head for optimal results. Travel-friendly, the toothbrush comes with a stylish travel case and a charging glass, making it easy to maintain your oral care routine on-the-go. Elevate your dental health with Philips Sonicare DiamondClean Smart – the complete solution for a confident smile.
Why r/BuyItForLife recommends it
9 mentions from real owners
- #1Dec 23, 2025
Sonicare vs OralB - which one is worth the money?
HX9368/35 (Sonicare Diamond Clean), purchased 2018. 2020 I was concerned about the seal flaws, so I purchased a new designed seal from eBay, a UK seller. Fitted it. Haven't had any issues. I open it yearly to inspect internals for any corrosion. 2025(December) the "white" LED is dimmer than the others. But I've never used the other modes honestly, only ever used the "Clean" mode. I never kept it on constant charge, only when the battery indicator shows amber, then I place on charge.
View on Redditopen_in_new - #2Dec 22, 2025
Switching from manual to electric toothbrush – which one should I buy?
I had my original Sonicare diamondclean for over 10 years before I had to replace it. Definitely recommended!! My parents bought a cheaper Sonicare and needed to replace more often. I think the Diamondclean is pretty close to BIFL.
View on Redditopen_in_new - #3Dec 1, 2025
Is it worth paying more for the high-end Sonicares, or are the basic ones just as effective?
I love the deep clean mode they have on the 9300 models and above. That said, the 7500 series has the same deep clean but they only trigger it for the last 30 seconds of a 2 minute brush cycle, it's literally a paywall. For that reason, I do really like the DiamondClean series, but heavy asterisk!
View on Redditopen_in_new - #4Aug 3, 2025
The Best Electric Toothbrush Currently?
I have the Phillips diamond. It comes with travel case but it's expensive but in my opinion it's the best
View on Redditopen_in_new - #5Jul 2, 2025
Name your top 5 BIFL items
1. Manduka yoga mat 2. Ninja blender 3. Sonicare Diamond 4. Kindle 5. Simple modern 32oz tumbler
View on Redditopen_in_new - #6Jun 2, 2025
Sonicare no longer BIFL?
They're made to fail now. I went through 3 within warranty period (which in their defense is terrific and no questions asked basically) before I attempted to just fix the third when it failed. They are repairable though. The problem you describe is that the metal shaft that your toothbrush head fits onto has become loose from the internal vibrating mechanism. This is simply a single screw that needs to be tightened. For a while Philips had designed this to be intentionally unrepairable but fortunately, they have seemed to go back to their repairable design now. In my mind this entire malfunction (which pretty much every sonicare toothbrush is destined to eventually experience IMO) could have easily been avoided if they just hit this screw with a bit of Loctite. That said it's still a great toothbrush and it's an easy fix. you should find a video describing the process online. I actually just had to fix mine again yesterday after about another year of no issues (went with red loctite this time so hopefully this is the last time I'll have to fix it.) If you do open it up and repair hit the bottom cap with some silicone adhesive to re-seal everything when you reassemble.
View on Redditopen_in_new - #7Jun 1, 2025
Sonicare no longer BIFL?
Amazing we have had the exact thing happened. Our replacement is acting up, luckily still under warranty . We have lost faith in the bifl of this formerly stellar toothbrush.
View on Redditopen_in_new - #8May 6, 2025
best electric toothbrush of 2025? drop down ur favorites!
I bought a Sonicare DiamondClean 6 years ago and it's still going strong. I'm using the A3 heads now which I prefer to the older ones. The charger is in the base of a glass cup, seems gimmicky but it's one less thing to think about. The pressure sensor on it seems to be good, keeps you from pressing too hard which can be bad for you.
View on Redditopen_in_new - #9Mar 5, 2025
Best Electric Toothbrush To Buy 2025?
Second the Sonicare. I can't speak to the current gen product, but I have a ~10-year old DiamondClean model that's been well worth the investment. I had to repair it a couple of times when the head got skewed (tighten & loctite 1 screw) and the vibrations lost strength (restore the air gap between the magnet and motor) both thanks to detailed repair guides on Youtube. Only tricky part was opening it up the first time. And since I've had it open I know I'll be able to swap out the battery when that inevitably gives out on me.
View on Redditopen_in_new