i bought my very first marc jacobs handbag! it is a black blake and i adore it. i bought it from eBay after the experts in this forum verified it as authentic. (thank you!) is it normal for the zippers to be a bit difficult? they dont open and close as easily as i am used to and i am having trouble unzipping and zipping if i am using just one hand. is there anything i can do to make this easier? thanks!