I am having problems printing on my photo printer. It has served me well for almost 10 years, but apparently I need to clean the rollers in the paper tray. I keep getting a message that the cartridge/paper is jammed and to reset the cartridge. I replaced the cartridge and was able to print out 6 photos and now the error messages are back. I noticed a comment elsewhere that states there are clips or levers on either side of the paper tray and it can be opened to gain access to the rollers. Where exactly are these located?