If I lose the user guide or a part that came with my SteriPEN, how can I get a new one? Ainsworth Kohler November 08, 2016 11:15 Updated Follow If available, we can send you a replacement for the cost of the shipping. User guides can be downloaded from the manual page on our website, www.steripen.com/user-guides. You may also Related articles What should I do if my SteriPEN is not operating as I expected. How far should I immerse the SteriPEN ino the water I'm treating? Adventurer / Traveler mini So, you're really upset with technical support. The Origional Steri-Pen Comments 0 comments Please sign in to leave a comment.