Elon Musk says Inspiration4 crew had 'challenges' with the toilet

SpaceX's Inspiration4 orbital mission with four non-professional astronauts was by all accounts quite a triumph for space history, space tourism and fundraising for St. Jude Children's Research Hospital. However, there may have been some tense moments when it came to using the toilet on board the Crew Dragon spacecraft.

SpaceX founder Elon Musk tweeted Monday night that the Inspiration4 crew had some "challenges" with the loo. He promised upgrades for future missions.
For better or worse, Musk didn't elaborate on the exact challenges. The all-civilian crew of four consisted of billionaire Shift4 Payments founder Jared Isaacman, St. Jude physician assistant and childhood cancer survivor Hayley Arceneaux, geoscientist Sian Proctor and aerospace industry professional Chris Sembroski.

SpaceX hasn't revealed much about how the toilet works, but Isaacman told Insider in July that the facilities were located near the spacecraft's large cupola window with a curtain to allow for a wee bit of privacy. He described the toilet as having "one hell of a view."

Toilets in space can be tricky. The International Space Station got a new toilet last year. It uses a suction system to keep waste from floating about and incorporates upgrades to better accommodate female astronauts.  

European Space Agency astronaut Thomas Pesquet took a flight to the ISS on a Crew Dragon earlier this year and tweeted a photo of the toilet on his ride, calling it "one of the most secret yet useful systems on the spacecraft."