I should start by saying the staff on the Navigator is great. But, this ship was refurbished in 2014 & was only outfitted with virtual screens in certain cabins (we had such a cabin) and navigation screens on each floor. I take issue with the bed linen needing to be updated (multiple cruisers complained of yellow tinted sheet, I had that complaint too). Also the bathrooms were terrible. Every time a ship is refurbished, new toilet seats/lids should be put in each cabin. That should be a given. They were so stratched up and dis colored.
The water sputtered out of the sink faucet & the water was sometimes discolored. That sounds like a bigger issue.
I really think the showers, toilet (seats & lids), sinks should all be replaced during the process.