I put enough water in the bottle to come up to the top of the label, then lay in the microwave on a plastic plate cover turned upside down. Be careful bottle not too full of water. Heat for 2-3 minutes. Use oven gloves to remove from MW. I use a sharp edge of a knife or small utensil to start the label and it peels right off. Using a funnel, I pour the hot water into another bottle, let it sit a bit. If needed can microwave again for shorter period of time. I can usually do 2-3 bottles per heating. If there is any residue, I use WD40 to spritz and let sit a few minutes, then a Mr. Clean Eraser sponge to clean off anything. May need a little dish detergent for residue also, be careful not to get detergent in the bottle. If the labels are too hard to come off, the bottle goes into the recycle bin.