I used to have to replace the syringes alot due to the numbers disappearing until I heard you can put a piece of scotch tape over them. Since I have done that, I haven't had to replace the syringe and the numbers stay perfect on the syringe!
Packing tape on syringes.
Sometimes it is the simplest things that are the hardest to see. LOL!
Great tip!!!
I use clear nail polish. Tape tended to peal at the corners.