how to fix a ticking problem after adjusting valves several times? on 1993 Honda Prelude

I adjusted the valves by what it says under the hood and its still ticking, not as bad but not like it was before. what would be the problem(s)? what is the best solution(s) to fix or parts that would keep it from making the noise.

Asked by for the 1993 Honda Prelude
try fuel system clean. ethanol treatment to 1 tank premium. ticking could be caused by build up in fuel system.