Stable rinse aid formulation and method of forming same

The invention provides rinse aid formulation useful in machine dishwashers and comprising low foam non-ionic surfactant, low molecular weight (meth)­acrylic acid polymer and high molecular weight stabilizing polymer, and a method of forming said formulation. The stabilizing polymer, which is at least about 85 percent neutralized, compatibilizes the low foam surfactant with the low molecular weight (meth)acrylic acid polymer in water producing a stable, homogeneous aqueous dispersion. The rinse aid formulation of the invention, when used in a machine dishwasher, enables improved wetting and drainage of substrates contained in the dishwasher, when compared to known conventional rinse aid formulations, to be obtained, whilst enabling reduced spotting and filming of the dried substrates exiting the dishwasher to be achieved.