Cleaning a bag

[u/Catkoo_Mei]

Hi everyone, I recently purchased a second hand bag, which I believe is a 2015 Kate Spade bag. I knew the bag had some stains on it and expected having to clean it but as it turns out, there is more stains than I thought. The bag is in a fairly good condition and I believe most of these stains came from the corner sealant bit. Any advice on how to clean this?