It's amazing what a little saddle soap can do : r/CleaningTips
Kiwi Saddle Soap, 88g : Amazon.co.uk: Fashion
Gold Label Saddle Soap, 100g - Glycerin soap to use for cleaning saddles, clothing, handbags, upholstery, footwear and all genuine leather products. : Amazon.co.uk: Pet Supplies
Fiebing's Saddle Soap, 3.5 oz, Yellow : Amazon.co.uk: Pet Supplies