Which lubricant(if any) did u use when u were trying to conceive?

I didn't use any lubricant, I did alot of research on it and it can do more harm than good. I decided to use FertilAid and so did my husband (there is a formula for men). It really helped with having good CM. We tried for 15 months and in 3 weeks with both of us on FertilAid I was pregnant.