Conditioning- recommend a preventative maintenance routine three to four times a year, once prior to the winter season to prevent cold temperatures cracking the leather, and once before the heat of the summer to prevent deterioration and shrinkage by heat, which result in continued cracking of leather. In addition to regular cleaning, leather requires replacement of natural oils; Collagen-based products restore the lost moisture and maintain it's natural flexibility. The smell of leather comes from oils evaporating out of the hide.
Schedule: Once every 30-60 days, Arizona, Florida and Texas, especially in summer, for northern climates between 90-120 days, use a leather conditioner to restore these natural oils and keep the leather soft and supple. (Criot's Leather Care, Autoglym Leather Care Cream, Zanio Z10 Leather in a Bottle or Zymol Treat leather cleaners are all good maintenance products)
Ultraviolet Radiation (UVR) Protection - you should consider additional sunscreen protection (especially if you own a convertible) leather conditioners typically do not offer any UV screening. The best solution is to alternate between a leather conditioner and a UVR Protectant. One month use a conditioner to keep the leather healthy and supple. On alternate months mist and wipe the leather with a UV protectant. After application allow 60 minutes for product to cure, then using a 100% cotton cloth lightly buff surface.
JonM