“The product is great but the thing i hate is how to brush is prone to getting mouldy.”
Oral-B iO Series 9
Based on 24 comments across 2 communities
38% of 24 verified owners recommend the Oral-B iO Series 9.
38% of 24 verified owners recommend the Oral-B iO Series 9.
Affiliate blogs here say 100% recommend, while the owner-based score is 38%. They earn a commission on every sale — so we show them for transparency but never let them move the score.
The headline score reflects owners (Reddit, enthusiast forums), independent lab tests, and blogs with no affiliate links. YouTube and affiliate blogs are shown for perspective but kept out — hover the i for why.
“The product is great but the thing i hate is how to brush is prone to getting mouldy.”
“I bang my brush head in the sink and black mold chunks come out from all crevices. It's so disgusting that I put that in my mouth.”
“but it's value to my oral health has been inexpressible and absolutely worth every penny that was spent.”
“I have no interest in the App or the various modes - total BS”
“Go with the iO Series 9. Same cleaning tech, same pressure sensor, 7 modes - everything you actually need.”
“I've had the iO Series 9 since 2023 and I can say that the battery life on these things are garbage”
“the product is OK for what it does.”
“I think it’s BIFL because the main issue with electric toothbrushes is the battery eventually dying.”
“it was BLACK inside. Like not spots or chunks. It was completely covered. I almost threw up.”
“If you're serious about oral health and don't mind splashing some cash, the Oral B-io Series 9 is one of the most premium electric toothbrushes on the market. It has seven modes to choose from, leaves your teeth sparkling clean, and includes an AI-powered app that tracks your brushing.”
“I agree I've had this issue with the IO9 also, it slipped out of my hand into the sink”
“I’ve been using the same io9 for over 5 years with zero issues”
“I am on my 3rd one within 2 years. The quality, build and QA is not the same.”
“I’m a new series 9 user and one thing drives me crazy: I finish a brush program and then I want to switch modes to use the tongue cleaner mode, but I can’t find a way to switch modes other than waiting 30 seconds for the device to turn off and then I’m able to select mode when I wake it up again.”
“it’s running just as good as it was when it was new”
“It’s still going strong. No issues at all.”
“Unfortunately, I made a big mistake by paying extra for iOS 9”
“I returned mine (hated it) and bought an older edition”
“The brush itself is brilliant”
“I’m obsessed with my io9”
“my io9 battery start acting up after 2 years of use”
“the toorhbrush is solid”
“however overall build quality is not good”
“Slippery when wet is ridiculous”