"check all seals", dryer too hot.

[backwalker]

The top of my dryer is getting too hot to touch. I just cleaned out the vent from roof to intake on inside wall. While reading older posts it was suggested to "check all seals in unit" or "check if poor drum seal" if dryer is running too hot. Can someone please explain to a novice how to do this. I’m very good at following instructions. Another suggestion was to take the cover off blower and clean from vent sys inside machine to the blower. Please explain this one also. Thank you so much for your prompt attention to this matter.