Peptide Critic Community

@researchcat maybe a very small amount of silicone lube on the screw would help? probably best to try it out on a cheap pen in case it causes more problems.

My apologies if this is too off-topic but can these pen vials also be used for oils as well as peptides? I've gotten increasingly frustrated with trying to not have a lot of waste or incorrect dose on items with very low amount of units, using syringes. While with water, it's easy to add more, it's not so easy for me to get supplies to dilute a oil, and I only need 2 units.