Digital BW, The Print

Years ago, I bought a 60ml syringe from somewhere - MediaStreet maybe? 
It's purpose is to load ink carts. When I started using PiezoTones with 
my 7600, you could only buy the inks in 4oz bottles so I had to fill my 
own carts.

The more I use it, the harder it gets. It's like the rubber seals on the 
plunger need to be lubricated. Is there any lubricant I can use that 
will help the plunger slide easier, maintain the seal, and not 
contaminate the ink?

Secondary syringe question - anyone know where I can find a smaller 
syringe - say 5ml? I want it to measures some darkroom chemistry when I 
mix stuff for one-shot use.
-- 
Bruce Watson