Blow jobs

So my SO and I have agreed I’m much better at road head than I am regular. What can I do to improve? Can I trick my gag reflex im unable To deep throat more than like 2-3 times during a BJ. Anything new to try to make things better (he doesn’t like the ice trick).

Also I hate the taste of cum(and smell) is there any way I can alter it for him? Make it better for me, I’d love to swallow for him but I can’t even think about it without gagging.

Not just him but boyfriends in the last have always tasted like dirty bleach water to me and smelled the same

UPDATE: I meant to add this! My husband and I mainly drink water and don’t eat our regularly and avoid junk foods; also we’re both clean so it’s not from any sort of infection or anything