I had a lot of issues with the Tk-479 toner for the CS305i and the CS 6530i dropping from 25% to 0 in the same day. I've had a customer use 3 toner cartidges for a total of 13k on the copier. Their coverage is between 5% to 8%. I understand the first toner is a starter toner, but the other two are not. This is happening with these copiers at multiple locations. Any input would greatly be aprreciated.
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