Controlling a pump during operation of an oral care device

An oral care device, comprising:

• an oral insert;
• a pump;
• a back pressure sensor;
• an effluence conduit;
• a fluid inlet port having a plurality of manifold openings;
• a fluid reservoir;
• and
• a controller configured to provide a control signal having a duty cycle to the pump in response to an actuator being engaged and based on an output value from the back pressure sensor, wherein the output value from the back pressure sensor indicates whether the controller should turn on or turn off the pump and is indicative of back pressure in a fluid being provided by the oral insert due to the oral insert being filled with the fluid, wherein responsive to the control signal, the pump causes the fluid to be provided from the fluid reservoir to the oral insert according to the duty cycle via the fluid inlet port having the plurality of manifold openings, wherein the effluence conduit allows a previously provided portion of the fluid to drain from the oral insert, wherein an active phase of the duty cycle providing a current portion of the fluid occurs in the control signal when the output value of the back pressure sensor indicates that some or all of the previously provided portion of the fluid has drained from the oral insert via the effluence conduit and during an inactive phase of the duty cycle the some or all of the previously provided portion of the fluid is draining from the oral insert via the effluence conduit to a sink while the pump is off.