Soft99 Glass Stain Cleaner (80ml)

Apply a small amount to a damp foam or microfibre applicator pad. Work the product into the glass in overlapping circular motions, focusing on heavily stained areas. Once the haze lifts and the product starts to dry, buff off with a clean, dry microfibre cloth. Work one section at a time, especially on large windscreens.

Yes, the formula is safe for factory-tinted glass. If your vehicle has an aftermarket window film applied to the inside surface, keep this product on the exterior only. Do not apply it to the tint film side, as abrasive compounds can damage or haze the film surface.

Absolutely. It is suitable for all exterior automotive glass including wing mirrors, rear windscreens and rear quarter windows. For heated rear windscreens, use light pressure and avoid abrasive rubbing directly over the heating elements.

Yes. A dual-action polisher on a low to medium orbit setting, paired with a soft foam pad, will speed up the process on heavily contaminated glass. Keep the machine moving at all times and avoid dwelling in one spot, as glass can heat up quickly. Buff off residue by hand with a clean microfibre cloth.

No. The Glass Stain Cleaner is a preparation and correction product, not a sealant. It removes contamination and restores clarity. For water-repellent protection and hydrophobic beading, follow up with a dedicated glass sealant or rain repellent such as Soft99 Glaco or a comparable glass coating after using this cleaner.

As you work the product into the glass, the residue will shift from white and creamy to grey or brown, which indicates it is lifting contamination. Once the glass feels smooth underhand and the residue begins to dry, it is ready to buff off. Hold a torch or panel light at a low angle to check for remaining haze or spots before moving on.

While the formula is gentle, interior glass is typically coated with outgassing residue from plastics and dash materials rather than mineral scale. A dedicated interior glass cleaner is more appropriate for that surface. The Glass Stain Cleaner is designed for and best suited to exterior glass contamination.

Use it as needed, typically when water spots or road film are visible and do not respond to a regular glass cleaner. In areas with hard tap water or where vehicles are frequently exposed to industrial fallout, you may find yourself reaching for it every few months. Keeping a glass sealant on top of clean glass will significantly reduce how often a deep clean is required.