How do i clean the heads of my printer? -

i am having trouble with my picture mate and i think i may need to clean my jet heads or something??

Open the printer case (front door? top?) and the movable carriage should reset to the middle of the machine for easy access. Most cartridges snap or pop into this assembly. Snap yours out (mine have always been a tipping then lifting action); then to clean, get some rubbing alcohol (Listerine will do in a pinch) and Q-tips; dip the tip into alcohol and rub this over the bottom of the cartridge (there is a group of small metal tabs amp; gizmo s); repeat until the tips no longer have red/green/ or other colors on them. Re-insert cartridge in reverse of extraction method.