Final answer:
To clean dried blood on countertops, hydrogen peroxide is a common and effective solution, as it can break down blood and disinfect. Alternatively, diluted dishwashing detergent can be used followed by an all-purpose cleanser for a thorough clean.
Step-by-step explanation:
To clean dried blood on countertops, one can use a combination of household cleaning agents that are effective in removing protein-based stains such as blood. A solution such as hydrogen peroxide can be particularly effective, as it has the ability to break down the blood and disinfect the surface.
For surfaces that may be sensitive to hydrogen peroxide, diluted dishwashing detergent with water can also be used to clean the area. After applying the chosen cleaner, scrubbing with a cloth and then rinsing with water should remove the residue of the blood.
Furthermore, for best results, especially on non-porous surfaces like countertops, an application of an all-purpose cleanser can be efficient after the initial cleaning to ensure a streak-free and hygienic finish.