Another life timer.
OK I have a couple questions for you people that give free life time fixes so that the OP can make a more educated judgement. How many times since you have been making pens have you fixed a pen for a customer and have you had to do this repeat times and how many times for the same customer???
What kits are the ones you had to fix?? Did you have to buy new parts or able to fix without or did you have to take the pen apart to fix???
Has this customer been a repeat customer or have they driven sales your way???
How many pens do you say you sell per year???
What are your average prices per pen that have broken or misused??
Has the customer shipped the pen to you and you ship back for free or have they hand delivered and picked up???
Have you changed any sales procedures such as doing away with a certain prone kit, changed finishing techniques because of failures in finishes, added educational material with your sales of any kind???
All these questions come into play when making the decision to fix for free and how often. You may not realize it and just do it but there is a cost to you. How you look at it and if you take repairs off your taxes that is a personal thing. But these same questions apply to each and every person that has a business.
Hope this will help the OP and others as they get into this and try to sell their pens and become rich and famous.