So I just watched a video on YouTube where a guy used the standard razors you get from Home Depot to clean the glass on his reef tank. I always assumed the metal and oils on that would be very bad in the tank so I never would dare do it. Am I right to assume this or am I crazy? Now keep in mind the video was a guy that hasn't touched his tank in a year so he may not be doing all the right things........... Thoughts?