I never take it out of the tank so I don't run into that issue.  If you know how to work with them while in tank, you wont have any issues either.  And until recently, I always used the cheap magfloat ones you can get form petsmart.  They do a great job and don't have the magnetic force as some like the aglaefree magnavors or similar.  I do have one of the phiranas now, and have no issues sticking some algae under it.