vaping while ttc

not really sure where to post this but my husband and I used to be smokers about a year ago we quit and went to vaping, we quit that for a while to when we found out we had to do <a href="https://glowing.com/glow-fertility-program">iui</a> but then stress of infertility stuff and everything that was going on had us picking it up again. I'm doing an <a href="https://glowing.com/glow-fertility-program">iui</a> in a week or less and I'm so worried it's going to harm our chances. I tried quitting cold turkey but it didn't work out. anyone with similar experiences and best ways to quit? we want our baby so bad but I don't want to be the reason it doesn't work.