The sun is your worst enemy. Living in FL, I have the best tint money can buy. :cool I recently tried Meguiars gold class leather wipes in the pop up can. Does a nice job on my red leather, not slippery, low sheen, pleasant subtle aroma. What your main concern is keeping it from drying out and cracking.
I do not believe in using leather cleaners, only if you have heavy soiling or dirt. I prefer for cleaning leather good old saddlesoap. Been using it on my boatshoes for years. Once your leather has thoroughly dried, use a good leather preservative. Mothers,Meguiars, Zymol.....anybody who is anybody in car care makes something. They all make similar products to preserve and protect leather. I prefer the creams as opposed to spary liquids. I am sure everyone out here has their favorite.