Hi Jenny, can you provide me with the model number of your dishwasher.
Generally the S warning light is to signify a lack of salt, this wont be causing the build up of soapy water, so we can discount that at this time, but should be easily rectified by just adding salt to the compartment in the dishwasher.
With regard to the brush icon, I can only comment once I have looked up your model number.
It may be worth putting it on a rinse, and see if all the water drains away, if your left with soap suds this proves its not a drainage problem but rather the amount of soap or lack of water causing the issue, if you still have a pool of water then it would suggest its a drainage issue.
No problem Jenny, Please rate the service received today, so I can marked the question resolved.
I wont close the question until the end of the week, just encase the issue reoccurs, if it does just message back, and we can continue to troubleshoot.