
Philips Sonicare
ProtectiveClean 4100
Affordable, durable, great clean; strong vibration and magnet issues.

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I have Oral B Pro 1. It’s a basic Swiss army one iykwim. Just get one without niche replacement heads so you don’t have to spend a fortune. I can get mine in Tesco.
Had oral b my entire adult life Took a punt on one of these unknown brands on Amazon (couldn't tell you which, but it was pink) & frankly it made the *sound* of an electric toothbrush, but there was very little brushing going on. Was so weak. What was more annoying, was that it wasn't a "cheap" one, was only about £5 cheaper than an oral b, but, convenience Ended up buying yet another oral b in the sale for £30 at Sainsburys(also pink!) but there were cheaper models there. It's worth a Google to see where the offers are on them So many heads made that fit orals B's now too for a fraction of the cost. My favorites are the wisdom ones from b&m
There's one in superdrug just now Just seen you're worried about rotating being hard. It can feel that way at first, but after a couple goes the new brush calms down. Also can get soft oral b fakeies, have seen them [pink](https://www.superdrug.com/electricals/electrical-toothbrush/oral-b-pro-1-pink-electric-toothbrush-travel-case/p/833113?gclsrc=aw.ds&gad_source=1&gad_campaignid=18158841722&gbraid=0AAAAADp4mz8cI5jD1LYzBg6Llk2fkocLz&gclid=CjwKCAjwhqfPBhBWEiwAZo196iahcE3LsQcWfG3M4oahYloyULVj0bkFCaUMtj3c-ZP_eZLLnf77DRoCka4QAvD_BwE) Hope you find something that works for you!
Oral B. First one, for almost 15 years (yes, the battery finally went kaput). On my second one now.
I think you did receive a defective item. I also opened my old one but a different model (I think it was Pro 1 1000) to see if it was a wiring issue because it stopped charging — turns out it was a charger issue — but the inside didn’t look anything like that.
I have a 3757 which looks the same as yours but is much cheaper. It probably is legit the same toothbrush with yours having some marketed extra to push the price point 4x higher. Mine is always dripping water so I bet my handle has the same problem
I don't recommend the brush heads with the little yellow "flossing" paddles. Beat the hell out of your gums. Whether you get the pro or the iO you'll want to use soft bristles. I have an io myself. I like it, but it's true that mold is a concern. You have to stay on it.

Philips Sonicare
ProtectiveClean 4100
Affordable, durable, great clean; strong vibration and magnet issues.

Philips Sonicare
4100 Series
Affordable, durable, great clean; some find vibration unpleasant.

Oral-B
Pro 1000
Affordable, effective rotating clean, but loud with poor battery.

Oral-B
iO 3 Black Electric Toothbrush
Exceptional clean, gentle, but mold-prone with pricey heads.

Philips Sonicare
ProtectiveClean 6100
Gentle, advanced clean, good value, but bulky travel case.

Ranked #1
Autobrush - Sonic Pro Electric Toothbrush

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Philips Sonicare - Philips One Rechargeable Toothbrush

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Oral-B - Pro 1000

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Philips Sonicare - ProtectiveClean 5300 Sonic electric toothbrush

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Oral-B - iO 3 Black Electric Toothbrush

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Oral-B - iO 3 Black Electric Toothbrush