Alcohol mixtures at 60 to 85 percent are best for destroying viruses. Whenever you decide to share joints, pipes, or bongs, make sure there is Alcohol nearby. A quick wipe down with alcohol should get rid of viral contaminants located on any of the glass, silicone etc. Just make sure the alcohol is at 60 to 85 percent. Anything below 60 percent won’t do much to the virus and anything above 85 percent won’t be that effective too.