Stop using harsh chemicals on your leather. Not only does this dry the leather out over time but also it is bad for the health of the user and planet. Use Geist Rapid Leather and Vinyl Cleaner for all your car leather and vinyl cleaning needs. Derived from plant and algae detergents, it contains 0% soap and is 100% solvent free.
The natural formulation was designed to reach deep into car interior pores to effortless clean leather, vinyl, synthetic or artificial leather. Keeping these surfaces clean from contamination retains their flexibility, softness and "new" look. Using the traditional stronger chemical cleaners may indeed remove the direct dirt, but it is likely to disrupt the pH-balance of the material, leading to cracking and overall damage.
The other fantastic thing about Geist Rapid Leather and Vinyl cleaner, as it is 100% soap and solvent free, it can be left on the surface to remove more soiling and dirt. Resulting in less damage to the colour as less friction is needed.
All of this cleaning power in a product which is more environmentally friendly, safer for your car and safer for you compared to harsher traditional chemicals.
For stubborn stains, leave the cleaner on for longer and then scrub with the leather brush. Test a hidden area for any colour loss before any deep clean. Poor or old recoloured leather / vinyl paints can rub off when wet cleaned.