I think the best way to avoid the color transfer to your PVC Burberry Check bag is don't wear anything with dark colors.
Just wear really light colors like white or cream shirts or khaki's instead of jeans when matching with your Burberry bag. Since I like the Nova check crossbody bag I bought, I end up cleaning it with baby wipes but once it gets color transferred on it, the color won't come off. Baby wipes works a little bit and follow thru with paper towel to dry it off.
It will be very expensive to have Nova check back because you will end up buying light color clothes instead. Or maybe bring your dust bag with it everytime you want to place it somewhere won't get dirty which is kinda odd.
So now, much as I like Burberry check bags, I don't want to buy it anymore. I find it not comfortable to use because you end up worrying your bag will get dirty.
I already read a lots of complaints with this forum before, I realized its true when I bought the bag. Though I'm glad I got it on sale at Holt Renfrew.