A: Dishwasher: REMOVE dishwashing rinse agent before using CLR Calcium, Lime and Rust Remover. Pour a 1/2 cup of CLR Calcium, Lime and Rust Remover directly into the bottom of an empty dishwasher (no glasses, dishes, or flatware but the racks can stay). Run a normal cycle followed by an extra rinse cycle. Make sure there are no detergents or any other chemicals in the machine while using our product. Washing Machine: Run your empty machine (no clothes) without detergent up to the main wash cycle, which is where the water stops and the cycle is about to agitate. Stop the machine and add one-half cup of CLR Calcium, Lime and Rust Remover directly into the tub of the machine. Finish cycle. Run one additional full cycle (wash and rinse) with water only to rinse machine fully. If your machine is HE (high efficiency) and/or 'Water Saver' we recommend using a 1/4 cup of CLR Calcium, Lime and Rust Remover, instead of the normal 1/2 cup recommended for any other type of washer/dishwasher. For Front Loading Machines: Simply add a 1/2 cup of CLR Calcium, Lime and Rust Remover to the soap dispenser (only 1/4 of a cup for HE machines). After the full cycle has completed, run an additional rinse cycle with just water. Make sure there are no clothes or other chemicals in the machine when using our product.

A: Add a ½ cup of CLR to either machine where you normally would add your detergent or softener and run your machine. With both types of washers, once the cycle with the CLR has finished, run an additional full cycle with just water. If your machine is high efficiency or “water saver” only use ¼ cup of CLR.

A: While our CLR Calcium, Lime and Rust Remover is safe to use on white grout only (no other color), it's specifically formulated to dissolve mineral deposits caused by hard water (calcium/lime) and/or rust or soap scum. It's not formulated as a general grout cleaner

A: Not a clue but I would ask your washer mfg

A: Our CLR Calcium, Lime & Rust Remover is safe on PVC pipe.

A: As long as the face plate of the iron is not coated, we'd recommend a diluted solution - equal parts of our CLR Calcium, Lime and Rust Remover and warm water. Ensure it is thoroughly rinsed off the material after 2-3 minutes. Repeat the process if necessary

A: Our product works most effectively if our product can adhere directly to the affected stained areas undiluted. If you have hard water buildup or a stubborn looking stain below the water line, the best way is to remove the water from the bowl (either physically or turn the water valve off located behind the toilet, flush it then plunge out any remaining water). If stains are above the water line there is no need to remove the water. In either application: Apply the CLR directly to the stains using a damp cloth or sponge, take a stiff bristled brush or a pumice stone (sold in hardware stores for toilets, it’s compressed lava, needs to be run under warm water to moisten first and is safe enough not to scratch the porcelain), and scrub for no longer than 2 minutes gently in a circular motion. Flush to rinse. Repeat if necessary

A: Our CLR Calcium, Lime and Rust Remover cannot be used on any natural stones.

A: Our CLR Calcium, Lime and Rust Remover is safe to use on stainless steel (& chrome), no other metals/finishes. Depending on the material of your white metal door, if it's not stainless steel or chrome, we would not recommend it, also our product should not be used on any painted, coated or sealed surfaces

A: Unfortunately we don't recommend CLR for cast iron. The best way to take the rust off of cast iron is to use a nonmetallic scrubber to remove the rust, wash with a mild dish soap, rinse well, and dry with a clean towel. Then re-season the surface by coating it (inside and out) with unsalted vegetable shortening. Put the greased pan upside down on a foil-covered baking sheet and bake at 350 degrees for 1 hour. Let cool, and remove excess grease with a paper towel. To prevent rust, never soak cast iron in water, put it in the dishwasher, or scrub with metal scouring pads or harsh cleansers. Put a paper plate, paper towel, or round coffee filter between stored pans to absorb moisture.

A: Yes, our CLR Calcium, Lime and Rust Remover can be used full strength on glass. You can either apply the product using a damp cloth or sponge to the affected areas of the items or you can soak them in the product. Either way, after 2-3 minutes rinse thoroughly with clear cold water. Repeat the process if necessary. Note: Due to the natural density and hardness of calcium as a mineral, if you are unable to scrape any residue off topically using a fingernail or razor blade, the calcium can actually etch the glass and embed itself into the material of the glass. If this has happened, there is no remedy for this.

A: Our CLR Calcium, Lime and Rust Remover is septic safe