I also use these ones. Dont have to clean them to often. Picked up another pair and they where the stainless steel ones. Those are not going to be as good I bet seems metal with no coating gums up way fasternothing sticks to them? …I am sorry to question you but I find that hard to believe how long you been using them? I have been using the same ones with but the black tips and they work good for a bout a hr or 2 then they need to get cleaned with iso…on sale right now for 16.99 for 2 pack View attachment 1526626