there is a tool that works like a paint spray gun. you hook air pressure to it and attach the feed hose to the bleeder. open the bleeder and press the trigger. the suction effect pulls the fluid out into a jar. close the bleeder when it runs clean. the syringe method may remove part of the old fluid, but not all. the amount left surely has contaminants left in it. to me, that is a ryobi tool compared to a snap on tool. may be popular, but not right.
https://www.amazon.com/dp/B081GVKXLN...mcd_asin_0_img