Vaping and conceiving

Me and my partner have been ttc for two years. He had his sperm analysis and it came back just under average at 17 million, low motility, not shaped well and also low concentration. Me and my partner both vape. I have heard stories of how these attributes are common of vaping. His brother and his wife also tried for two years and a few months after he stopped vaping they conceived. Could be a happy coincidence but me and my partner have just stopped today in hopes it makes a difference or treatments may be required. Any thoughts as I am unsure. We have been vaping for many years. Thanks all.