I use alcoholic dabbed onto an old washcloth and wipe the rotors!the seals in the caliper of the brake. if you clean the rotor while its on the bike and get it into the caliper that could cause issues.
Probably the safest way to prevent the above happening.
 
 
		
 
 
		 
 
		 I used mineral spirits once, before riding and some experienced rider gave me advice with wisdom on steroids that mineral spirits is a no no!
 I used mineral spirits once, before riding and some experienced rider gave me advice with wisdom on steroids that mineral spirits is a no no!
 
 
		
 
 
		 
  
 
		 
 
		 
  
 
		 
 
		 
 
		 
 
		 
 
		