Updates: From time to time, I will edit sections of this FAQ to add new information on a covered subject. If you have already read this FAQ in the past and currently have a problem, please take the time to re-check the FAQ and see if the answer has been added. Read through the C2 FAQ written by @mark tomlinson -> http://community.robo3d.com/index.php?threads/faq-c2.19861/ A lot of information posted there is applicable to the R2 printer since the two Robo printer products share a lot of common hardware and software. If you are having an R2 printer or a printing issue, please check the Troubleshooting area ( or other appropriate area ) and see if someone else has encountered your issue. If not, then ask for help there. When a reference is made to using alcohol for cleaning purposes, they are referring to 91% isopropyl alcohol which is available at most pharmacies.