Citing from https://www.jw.org/en/bible-teachings/questions/what-is-the-holy-spirit/ :
"The holy spirit is not a person
By referring to God’s spirit as his “hands,” “fingers,” or “breath,” the Bible shows that the holy spirit is not a person. (Exodus 15:8, 10) A craftsman’s hands cannot function independent of his mind and body; likewise, God’s holy spirit operates only as he directs it. (Luke 11:13) The Bible also compares God’s spirit to water and associates it with such things as faith and knowledge. These comparisons all point to the impersonal nature of the holy spirit.—Isaiah 44:3; Acts 6:5; 2 Corinthians 6:6.
The Bible gives the names of Jehovah God and of his Son, Jesus Christ; yet, nowhere does it name the holy spirit. (Isaiah 42:8; Luke 1:31) When the Christian martyr Stephen was given a miraculous heavenly vision, he saw only two persons, not three. The Bible says: “He, being full of holy spirit, gazed into heaven and caught sight of God’s glory and of Jesus standing at God’s right hand.” (Acts 7:55) The holy spirit was God’s power in action, enabling Stephen to see the vision.
Misconceptions about the holy spirit
Misconception: The “Holy Ghost,” or holy spirit, is a person and is part of the Trinity, as stated at 1 John 5:7, 8 in the King James version of the Bible.
[...]"
However the Scripture leaves no ambiguity regarding this matter, whichever misconceptions may arise out of inaccurate translations.
"11 I baptise you in water for repentance, but the one who comes after me is more powerful than I, and I am not fit to carry his sandals; he will baptise you with the Holy Spirit and fire.
12 His winnowing-fan is in his hand; he will clear his threshing-floor and gather his wheat into his barn; but the chaff he will burn in a fire that will never go out.'
13 Then Jesus appeared: he came from Galilee to the Jordan to be baptised by John.
14 John tried to dissuade him, with the words, 'It is I who need baptism from you, and yet you come to me!'
15 But Jesus replied, 'Leave it like this for the time being; it is fitting that we should, in this way, do all that uprightness demands.' Then John gave in to him.
16 And when Jesus had been baptised he at once came up from the water, and suddenly the heavens opened and he saw the Spirit of God descending like a dove and coming down on him.
17 And suddenly there was a voice from heaven, 'This is my Son, the Beloved; my favour rests on him.'"
How would you interpret the 16th verse otherwise considering the Father was also present? There is also a very dire warning:
"28 'In truth I tell you, all human sins will be forgiven, and all the blasphemies ever uttered;
29 but anyone who blasphemes against the Holy Spirit will never be forgiven, but is guilty of an eternal sin.'
30 This was because they were saying, 'There is an unclean spirit in him.'"
What prompted the Jehovah's Witnesses which was founded less than 150 years ago to disregard the entire history of Christianity which respected the Holy Spirit as part of the Trinity?
https://www.youtube.com/watch?v=M-rgQve74BI