Upload & Sell: Off
Don't bother to remove the carts and shake them up--no need to generate air bubbles or place addition wear on the ink ports.
Place a wide belt or strap directly under the front of the printer, now holding the belt upwards with both hands, lift the printer up/down 3-5 in for several times. This will induce rolling 'waves' inside the cart, more than satisfactorily agitating your inks!! Conveniently repeat this action whenever--the belt will always be there.