My partner said the hamsters were too easy so here I present the uncatchable hamsters :P
You very right that the bathtub mechanics are one of the rather confusing parts of the game, if we had more time we would have tried to make it more clear, but in short you fill it a few times up with various temperatures of water determined by the timing minigame, your goal is to average out the overall temperature to be perfect. The vacuum is in the corner of the living room in case you didn't notice
Thank you for playing! Glad you enjoyed the rest of it :D