Great question! And as you know, Sola Scriptura (Bible Alone) is the
foundation of Reformation Theology, so whenever Orthodox talk to them about Tradition, defensives go straight up fast
One thing I always found helpful is to point out all the different denoms/sects who all read the same Bible. Here's a couple of quotes from the book Sola Scriptura
by Fr. John Whiteford:
"...If Protestantism's foundational teaching of sola Scriptura is of God, why has it resulted in the formation of over twenty thousand differing groups that can't agree on basic aspects of what the Bible says, or even on what it means to be a Christian? If the Bible is sufficient apart from Holy Tradition, why can a Baptist, a charismatic, a Methodist, and even Jehovah's Witness all claim to believe what the Bible says, and yet no two of the agree o what it is that the Bible says"
"Protestants frequently claim they 'just believe the Bible,' but a number of questions arise when one examines their actual use of the Bible. For instance, why do Protestans write so many books on doctrine and the Christian life in general, if indeed all that is necessary is the Bible? If the Bible by itself were sufficiet for one to understand it the why don't Protestants simply hand out Bibles and let it go at that? And if it is 'all sufficient', as they suggest, why do Protestants not all believe the same?....Though they usually will not adit it, they instinctively know the Bible cannot be understood alone. And in fact, every Protestant sect has its own body of tradtions, though again they generally will not call them by this name"
And from the Bible itself:
"Therefore, brethren, stand fast and hold the traditions (paradosis
which ye have been taught, whether by word or our epistle"
2 Thessalonians 2:15
Hope this helps you. Good luck and God bless you!