Weiner Increments for Products of Noise

Question

In the construction of a Langevin equation, how would one handle an equation that looks like $\dot x=\xi_1\xi_2$? I understand that, for an equation like $\dot x = \xi$ one can write $dx=dW$ (Weiner process) but I don't understand what to do with $dx=dt(\frac{dW_1}{dt}\frac{dW_2}{dt})$. Thanks!