how to stop InvokeRepeating when it calls a function in 0.1 second?

Hello,

i have InvokeRepeating to call a function (kills a monster and damage in 0.1second) the problem is when this monster is dead and he drops loot the invokeRepeating calls the loot function 5 times instead of one time only.

i tried cancelinvoke but didnt work and i tried to check for a boolean and make it false inside the function but didnt work.

i think the problem here is because the invokerepeating calls the function so many times before it cancels, so who can i stop that?

here is an example of what i am saying:

 void Start () 
     {
         InvokeRepeating("DoingDPS",0,0.1f);
     }
 
 void DoingDPS () // original function
 {
    MonsterHealth-=Dps;
 
   if(MonsterHealth<=0)
   {
      //Kill it and drop items
   }
 }
 
 void DoingDPS () //function with bool check
 {
    MonsterHealth-=Dps;
 
   if(MonsterHealth<=0)
   {
     if(DoOnce)
     {
      DoOnce=false;
      //Kill it and drop items
      }
   }
 }
 
 void DoingDPS () // function with cancelinvoke
 {
    MonsterHealth-=Dps;
 
   if(MonsterHealth<=0)
   {
      CancelInvoke("DoingDPS");
      //Kill it and drop items
   }
 }