Hai Every one, I am using a plastic syringe for depositing SU8 2100 resist onto the wafer.. After the syringe is empty can I once again reuse the syringe to refill SU 8 resist..? The syringe has a rubber material where the residue's of SU 8 remained. To clean this I have taken some SU 8 developer into syringe and kept in a standing position so that the rubber material is rinsed with developer, for a night (No need for such a long time but to check whether the rubber material is affected with developer or not, But I havent found any changes in the material) After that I cleaned the syringe by rinsing with acetone and Iso proponal and also with DI water. I continued the same procedure for filling the resist into the syringe as before. I found very strange effects when I use the resist for my experiments.. Such as under exposure at one part of the wafer.. Does any one have any idea whether can we re-use the used syringe..? Thanks for a reply to my post in advance Regards, Riyaz Pasha Shaik