My wood knitting needles splintered on the ends so that they aren't sharp anymore...it is near impossible to knit with them now. Anybody else have this happen? Is this normal? I am not sure what kind they are b/c I got them from another mama here in a trade, but I *think* they are from LTK...they have the cute clay balls on the ends. Anyway, I barely got done practicing a few swatches (I am just learning) and then the very tip just splintered off leaving a not-so-sharp nubby end on the needle...can I fix this?