Your other hand should really keep the cylinder to stop it from slipping. The suggestion with the eyedropper need to be resting against the internal floor on the cylinder and slightly below the floor from the solvent layer. EDIT: I did the titration. I applied 500ml of my inventory solution https://deadheadchemistdmt95050.dm-blog.com/36313244/the-best-side-of-buy-copyright-usa