Hi. We have a Xerox d125 copy machine. I have noticed for the last 4 toner changes that the meter read level is starting at 88% and not 100%. Can someone please explain to me why a new toner cartridge would not start out at 100%? Has anyone else noticed this issue? I have alway s taken the cartidges out and shaken and reshaken them and no changes. Looking for some answers on this one. Thanks.