Since scattered OH sky emission can significantly reduce the detected signal-to-noise ratio of faint targets in the near-IR, it is critical to minimize scattering sources in the instrument. VPH gratings typically produce less scattered light due to the lack of ruling errors and grating flaws which are sources of scattering in ruled, surface-relief gratings. In addition to paying close attention to anti-reflection coatings and glass quality, we will also explore some developing technologies (e.g., Rugate filters and spectral-hole burning filters) which might be capable of filtering out much of the OH contamination. Such technologies could be retrofitted if and when they become viable.