A strainer for fitting in a drain of a sink and for being self-cleaning of residual solid debris sticking to the strainer without a user having to touch the residual solid debris, shake the strainer, or hit the strainer against an object. The strainer includes a bowl, a handle, a stopper, and a scraper arm. The bowl fits snugly within the drain of the sink, and is perforated to permit fluid to pass therethrough, while collecting the residual solid debris. The handle is movably mounted through the bowl to manually remove the strainer from the drain of the sink. The stopper is rotatably connected to the handle, is disposed below the bowl, and sits in the drain of the sink. The scraper arm is affixed to, and rotates with, the handle. When the handle is rotated by hand manipulation, the scraper arm sweeps along the bowl self-cleaning the residual solid debris sticking to the bowl without a user having to touch the residual solid debris, shake the strainer, or hit the strainer against the object.