walkthrough of rental property

Hi everyone,

I'm not sure how big of a problem this really is (or even if it is a
problem).  A few weeks ago, we agreed to rent a townhouse.  After some
negotiating, we signed a lease.  We did the walkthrough last weekend,
and were surprised to find the place much dirtier then when we had
originally visited.  It turns out that the landlord's daughter had
been living there (and may still be for all we know), and obviously
made very little effort to clean up.  We asked for another cleaning
before we moved in, or to have a deduction from the rent for the first
month so we could have it cleaned, but the landlord refused.  Since we
have already signed the lease, I don't think we have very much
bargaining power.  We're scheduled to move in next week, and I'm
afraid of what condition we might find the place in at that time.  Is
there any way we can force the landlord to clean it up?  Or should we
take pictures and leave the place dirty when we move out?

Thanks in advance...