DIY Landlording - clogged toilet

[Dan Perrott]

Today my tenant called me to say that I needed to call a plumber - the toilet was clogged.  He had attempted to unclog the toilet to no avail.  Needless to say, I went and unclogged the toilet and told the tenant that I am not their plumber for unclogging toilets and that there would be a charge the next time.

Questions:  How do you as a DIY landlord handle this with a tenant?  Do you charge a tenant a fee for unclogging a toilet?  Are there statements that can be added to a lease that cover this?

Looking for ideas to improve.  Thanks for your input.