Just to start, I began noticing intermittent leaking (small puddle of water mainly on the right side) from our Bosh dishwasher.
So I began researching and looking closely at the seals. One thing I found out is that there is a hole in the Bosh dishwashers on the right side wall and you should not be putting anything tall (cutting boards, pan lids, large plates etc....) and we were doing this.
The other thing I found out is that the door gasket looked very worn in several spots. Replacing the gasket we received was very simple. I did end up cleaning the the housing with dish soap.
Just fold the gasket in half to mark the halfway mark, begin inserting at the center of the Dishwasher (look at the latch) and just push the gasket in down the line and then go to the other side. you'll have 1/4" to 1" extra (note with the one I got here there was very little slack). Test the door to make sure it looks, sounds and feels like its sealing... NOT TOOLS NEEDED.
Test your DW by running it a couple of times when you can be around and can check for leaking while its running...
I did not replace the lower door seal as this part does not seem to need replacement.