Abstract: An automatic feed fluid dispenser comprising: a reservoir cylinder, for enclosing and containing fluid, the reservoir defining an inlet port and an outlet port; an elongated hollow shank, defining opposite inner and outer ends, each inner and outer ends defining a corresponding mouth, the outer end destined to carry transverse bristles; the reservoir outlet port and the shank member inner end mouth being interconnected; an elongated channel freely extends through the hollow shank and defines opposite first and second ends, the first end extending through the hollow shank inner end mouth and into the reservoir, the second end adapted to come in register with the shank outer end mouth; a valve is provided, for releasably closing the shank outer end mouth. An inflated balloon, or a spring-biased piston, continuously biases the fluid through the channel and toward the shank outer end mouth.