Read and follow the product label instructions exactly
Wear gloves and eye protection
Ensure the area is well ventilated
Remove standing water if the label instructs you to do so
Pour the recommended amount into the drain
Do not mix Drano with bleach, vinegar, ammonia, or other cleaners
Keep away from children and pets
Wait the amount of time listed on the label
Flush the drain with hot or warm water if the label directs it
Repeat only if the label allows it
Stop use and call a plumber if the clog remains
Use only on drains and surfaces approved on the label
Do not use on toilets unless the product label says it is safe
Store the container tightly closed in a safe place