Going up and down

You change the water, not the peptide, when the dose gets hard to draw. If a dose reads as under 5 units on the syringe, mix the next vial with more water so the same dose reads 10 or 20 units, which is far easier to see. If you are drawing most of the barrel for one dose, use less water next time. The amount of peptide in the vial never changes, only how far it is spread.