Based on general cleaning knowledge, as the provided context does not contain specific instructions, here are a few friendly tips for tackling that biro pen mark on your leather sofa.
The key to success is to act as quickly as possible and to always test any cleaning method on a small, hidden area of the sofa first to make sure it doesn't cause any discoloration or damage.
A great first step is to try a simple solution. Mix a small amount of mild soap, like a gentle facial soap or a specific leather soap, with warm water. Dampen a soft, clean cloth in the soapy water, wring it out well, and gently dab at the ink stain. Avoid scrubbing, as this can spread the ink and damage the leather's surface.
If soap and water don't do the trick, you can carefully try isopropyl (rubbing) alcohol. Apply a small amount of alcohol to a cotton swab or the corner of a clean white cloth. Lightly dab the ink mark, working from the outside of the stain inwards to prevent it from spreading. You should see the ink start to lift onto the swab. Use a fresh part of the swab for each dab to avoid reapplying the ink.
Once the stain is gone, gently wipe the area with a clean, damp cloth to remove any residue and then pat it dry with another soft cloth. After the spot is completely dry, it's always a good idea to apply a small amount of a good quality leather conditioner. This will help restore moisture to the area and keep your sofa looking its best.
If the stain is particularly stubborn or if you're nervous about treating it yourself, calling a professional leather cleaning specialist is always the safest option. They have the experience and professional-grade products to handle tough stains without harming your furniture.
