I am obsessed by leather care products and really tried a lot during the last years !!!
I get the very best result with this leather balm based on natural bee wax:
https://www.bense-eicke.de/de/leder...lederpflege/b-e-bienenwachs-leder-balsam.html
Before using this on my bags, I clean them with a bit of baby oil or with Collonil Leather Cream:
https://www.collonil.com/de/1909-leather-cream.html
Then I put on the B&E Leather Balsam. You don´t need much, it is of great smooth consistence and has a nice smell. After half an hour you can use your bag again, no film, no white marks. The leather is sooo smooth again and protected against rain and dirt.
I really love the product ! They now have a new line called B&E Brilliant, but I haven´t tried so far .....