The easiest way is to dial them down when you first create the cylinder.
I always forget and in Hex you can’t do it after you validate it so it usually means starting over even if you haven’t done anything yet with it.
Depending on your patience I can think of two ways for the point you’re at. The easiest might be to select all the edge loops between the ends and hit backspace<strays only(?). Check to make sure the points were dissolved also, sometimes they aren’t. Alternately, note all the srt(scale, rotation, translation) values for each one and create a new cylinder, replacing all the appropriate values.
I’d suggest the first especially if you beveled the edges of what you have now. Plus I usually can’t get Hex to behave properly when typing in rotation values. Snap<align(?) helps as long as you don’t delete the original before replacing it, which you shouldn’t do anyway until all the srts are the same.