Final answer:
Dispenser reservoirs should be sanitized with a solution containing hydrogen peroxide or isopropanol.
Step-by-step explanation:
The dispenser reservoirs should be sanitized with a solution containing either hydrogen peroxide or isopropanol. These substances are effective in killing bacteria and viruses.
Hydrogen peroxide is commonly labeled as a 3% by volume solution, while isopropanol is commonly found in hand sanitizers at a concentration of 60% to 80%.