  We theoretically demonstrate soliton steering in $\mathcal{PT}$-symmetric
coupled nonlinear dimers. We show that if the length of the
$\mathcal{PT}$-symmetric system is set to $2\pi$ contrary to the conventional
one which operates satisfactorily well only at the half-beat coupling length,
the $\mathcal{PT}$ dimer remarkably yields an ideal soliton switch exhibiting
almost 99.99% energy efficiency with an ultra-low critical power.
