Are you using the offcut splinterguard (little green doohickey)? You will get splintering if there is nothing pressing down from above on your workpiece. On the keeper side, that's your guiderail splinterguard. On the offcut side, it's the replaceable green splinterguard on the saw. It needs to be lowered onto the stock and gets cut into by the blade the first time you use it. It will become less effective at different plunge depths (ex if you use it for 3/4" stock, it won't do a great job for 1/4"), which is why it's a consumable. Good to grab a 5 pack and mark them for different stock thicknesses.