I have a Blaster Adantage bar code printer. It works well for the last few year. Recently the barcodes it printed are not able to to read by the scanner. The barcode is not as sharp and clear as it used to, kind of breaking up. I cleaned the print head with compression air and it did not help. Anyone know what went wrong? The printer is 9 years old. Is it just too old? thanks. Shun