Did you know, you can revive your dried up mascara by adding about 3-4 drops of contact solution or sterile saline to the tube? I just saw a post about this on Pintrest and gave it a try last week and it really worked great!
Once your mascara is starting to dry out a bit and you are about to reach for a new tube, stop and add 3-4 drops of contact solution or sterile saline in your Mascara tube. Pump only a few times and your ready to use it again. Apparantly it gets you another month of use out of your tube. This supposedly also works for liquid eye liner too although I have not tried it.