fiddle with
phrasal verb
            
              fiddled with; fiddling with; fiddles with            
        
    1
                    
                                          
              
          
                                                      : to move or handle (something) with the hands or fingers in a nervous way                                      
              
                             
She was nervously fiddling with her pencil as she waited for the test to start.
                         
                
                    2
                    
                                          
              
          
                                                      : to change or handle (something, such as the controls of a machine) in a way that shows one is not sure what to do                                      
              
                             
He was fiddling with the controls of the television, trying to get it to work.
                         
                
                    3
                    
                                          
              
          
                                                      : to change (something) in a harmful or foolish way                                      
              
                             
It became clear that someone had fiddled with the equipment.
                         
                
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  Merriam-Webster unabridged




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