How should household windows be cleaned and cared for?
Check the material and label, patch-test, remove everyday dirt with the Cleaner, wipe and let the surface dry, then apply a small amount of Maintenance Essence if care is needed.
What is the difference between the two products?
The Cleaner handles everyday dirt and comes first. The Maintenance Essence is the care step for clean, dry surfaces and hardware.
Does “benzene and toluene not detected” mean zero?
No. It means the target substances were below the reporting limits for the submitted samples, methods and stated conditions.
Check the original reports →How should a household with babies or pets use the products?
The site does not expand toxicology results into an absolute mother-and-baby, child or pet-safety promise. Follow the label, ventilate, prevent ingestion or direct contact, and store out of reach.
What if window hardware is difficult to operate?
First rule out deformation, looseness or structural damage. Routine care may help only after material confirmation and a patch test; serious noise or sticking needs the window manufacturer or a professional.
Where can I buy Dr. Lucheng products?
Mainland China customers can use the official channels listed on this site. Overseas customers can email 25404025@qq.com.
See official China channels →KNOW WHEN TO STOP
Some problems need repair, not another product.
Structural damage, serious sticking, persistent leaks or paint failure should go to the window manufacturer or a qualified professional.