For the low pressure issues , there may be dirt in the nozzle or the mouth of the nozzle is squashed for which the action would be replace the nozzle and if it is malfunctioning with the battery operation , inside the battery correctly and replace with new batteriesReach where dental floss often can't with high-powered dental water flosser pulsing to help remove food debris, plaque and bacteriaCordless power flosser with two-speed pulsing, a high-speed for normal, everyday cleaning, a gentler, lower-speed pulse for children and those with sensitive gumsEasy-fill 5.5-ounce water reservoir lets you floss longer between fills100% waterproof portable water flosser for quick, easy rinsing and cleaning under warm, running water