I don't know whether this will work but you can give it a try.
Wavelet transform works like a filter bank. Set the wavelet level to such a value so that the last level of the decomposition gives you a filter bank of nearly 0Hz - 5Hz.
Get the coefficients of the detail functions at this level and do a thresholding (soft/hard) on the same.and then compose back the signal using the new coeffiecients Blinks have a relatively high amplitude and thresholding on them might give you what you want.