SpotCheck Plus detects the presence of glucose and lactose on a surface as a rapid indicator of surface hygiene. Simply swab a surface, release the reagent, and if any residue containing glucose and/or lactose is present, the reagent will turn green. The more contamination present, the quicker the color change and darker the color. SpotCheck Plus instantly validates the hygiene of a surface, allowing immediate corrective action to be taken if necessary. If it turns green, it isn’t clean!