Hi Ozzy,
Your question doesn't quite give us enough info to answer fully (or I'm just forgetting, lol) but how far along are you with this filter?  How many days since tank start?  Fish-in or Fishless, if cycling?  Or is it a running tank?  Normally one avoids cleaning the filter during cycling but then begins regular cleaning perhaps a month after the cycle has successfully finished, unless there is flow reduction prior to that.  I agree with the others that its important to understand that media (even polyfloss, loose or in pads) is better just squeezed out and kept until it is seriously falling apart.  There -are- situations where its helpful to squeeze out media in a tank but these are usually when a tranfer of beneficial bacteria is desired between tanks, not within the same tank.
~~waterdrop~~