When the surface of aluminium doors and windows prices in sri lanka has besmirch to need cleanness, can use towel wet water to wring dry hind with soft force to undertake wiping try, besmirch is too heavy when can use furniture special cleaning agent to undertake decontamination immediately wipe clean.
Remember not to use acid and alkaline detergent is too heavy to wipe, easy to corrosion profile surface, reduce the service life of doors and windows.