When JWs come to my door I ask the Lord, "Should I talk to them this time?"

If he says no, I politely decline their offers.

If he says yes, then I share the truth and grace of Jesus with them, just like I would with anyone else.

Last time I witnessed to a JW, I explained to him that the statements made by Jesus in the Bible about His Father being greater than He are not inconsistent with the truth that Jesus is Himself eternally part of the Godhead. There IS some sort of order within the Godhead, nevertheless Jesus is Himself equal with God.

And of course, LOVE is the best way to win anyone to Christ.