Polite way to ask her to bath in the evening...

My wife doesn't like bathing in the evening after getting back from work. I have no problem with it but i have been kinda lax about it since she showed reluctance but i feel uneasy after a day of sweating. There is another issue i have been over looking, i gave her a massage recently and the smell that was coming from there wasn't pleasant. I have become sensitized to her body odor and sweat so i cant smell it anymore but it doesn't mean it isn't there though the smell of down there was eish. Well at that time the other head was thinking so i didn't say anything but how can i convince her to bath in the evening. As in put it all out on the table without offending her.