S.I. Model Tanya Mityushina -- Lingerie All Day ... I Clean Up Like This! (PHOTO GALLERY + VIDEO)

S.I. model Tanya Mityushina is out of her swimsuit and into something more comfortable ... the hottest maid outfit ever.

Tanya teamed up with famous music video director Chris Applebaum for some good, clean fun ... involving skimpy lingerie. What? This isn't how you tidy up around the house?

Check out the behind-the-scenes pics and the hot vid ... and don't feel dirty about it, either.