You may also pick a gentler cleaner with two strength settings

Philips Sonicare 2100 vs 1100 One Philips Sonicare 1100 electric toothbrush, one SimplyClean (C1) brush head, and one USB charger are included (wall adaptor not included). Each charge lasts two weeks with a long battery life and an indication light. Easy-start introduces you progressively to electric brushing by gradually increasing power. Philips Sonicare 2100 vs 1100 Its small, ergonomic design and well-known head shape provide you with everything you need and nothing you don’t. The Sonicare technology softly pulses water between your teeth, producing a noticeable difference. The ergonomic form of this toothbrush makes brushing simpler and more comfortable. The 2 minute SmarTimer with QuadPacer ensures brushing time is prescribed by dentists. maximum battery life of 14 days. The package comes with one Philips Sonicare 1100 electric toothbrush, one SimplyClean (C1) brush head, and one USB charger (wall adaptor not included). A long battery life with a battery light indicator: A single charge lasts two weeks. Two minutes of dentist-recommended brushing time is ensured with the SmarTimer with QuadPacer. Its small, ergonomic design and familiar-shaped head provide everything you need while leaving nothing out. Sonicare technology softly pulses water between your teeth, making a noticeable difference. Going electric may seem like a huge step, but you’re in good hands with this brush. Philips Sonicare 2100 vs 1100 Brushing is made easier and more comfortable by the slim ergonomic design.

You may also pick a gentler cleaner with two strength settings. One Philips Sonicare 2100 electric toothbrush, one SimplyClean (C1) brush head, and one USB charger are included in the box (wall adaptor not included). Easy-start progressively increases power to ease you into the electric brushing experience. Two strength levels provide a soft yet effective clean. Battery life can last up to 14 days. One Philips Sonicare 2100 electric toothbrush, one SimplyClean (C1) brush head, and one USB charger are included (wall adaptor not included). A long battery life with a battery light indicator: A single charge lasts two weeks. Two minutes of dentist-recommended brushing time is ensured with the SmarTimer with QuadPacer. Its small, ergonomic design and familiar-shaped head provide everything you need while leaving nothing out.

The ergonomic form of this toothbrush makes brushing simpler and more comfortable. The 2 minute SmarTimer with QuadPacer ensures brushing time is prescribed by dentists. maximum battery life of 14 days. The package comes with one Philips Sonicare 1100 electric toothbrush, one SimplyClean (C1) brush head, and one USB charger (wall adaptor not included). The transition to electricity may seem daunting, but with this brush, you’re in good hands.  I've only had one type of unit. Remove the brush tip and unscrew the top of the handle. It appears to be a unit. Cleaning the dirt from the handle unit and the brush portion will sometimes resuscitate the device. If not, discard the brush unit and replace it with a new brush unit.  They're referring to the bristles vibrating quickly enough to shed water in a spray pattern. The sentence you are referring to does not appear in the description for the later version of that model, which might lead someone to envision a function that does not exist. 

Philips Sonicare toothbrushes employ Sonic Advanced technology to softly pulse water between your teeth, breaking up plaque and brushing it away.  I've just replaced the head once, and everything inside appeared clean and regular. I've only owned it for approximately a year.