QUAVIET

Hope you can bear with me for yet another coin question. I am considering joining PCGS for the free coin submissions since the free submissions will more than pay for the membership at either Gold or Platinum membership level. The lady over the phone said that they had no problem cracking out a NGC slab for a PCGS slab but that my original US Mint coins in a lens, this they would not do. I fail to see the difference and have asked for clarification. My Question: How do you remove the original government lens for submission to PCGS? I already know that it will have to be sent in a mylar sleave which they provide. Being a novice I sure would not want to damage a silver, gold or platinum coin while trying to remove it. Thanks again for all of your knowledge.