I do not have personal experience, but I can provide you with general tips on how to remove stains from a Quartz kitchen:

- For general cleaning, use warm water mixed with a mild detergent and a soft cloth or sponge. Be gentle and avoid abrasive cleaners, as they can cause scratches on the surface.
- For stubborn stains, make a paste with baking soda and water or white vinegar, and apply it on the affected area. Let it sit for a few minutes, and then scrub gently with a soft brush or sponge. Rinse with water and dry with a clean cloth. You can also try using a specialized Quartz cleaner or a non-abrasive kitchen degreaser.
- To deal with grease or oil stains, use a mixture of warm water and dish soap or a degreaser. Wipe the area with a soft cloth or sponge, and rinse thoroughly. Repeat if necessary.
- For mineral deposits or hard water stains, use a solution of equal parts white vinegar and water. Apply it on the stain, and let it sit for a few minutes. Wipe with a damp cloth and rinse well. Avoid using acidic or alkaline cleaners, as they can damage the Quartz surface.
- If all else fails, try using a Magic Eraser or a gentle abrasive pad. Rub the stain in a circular motion, and rinse well. However, be careful not to apply too much pressure, as it can scratch the surface.

Always test any cleaning solution or method on a small, inconspicuous area first, and follow the manufacturers instructions and recommendations for maintenance and care.