I agree completely with Albert. On Lp's on which I apply LAST, I follow the same procedure as LAbert using RRL fluid. LAST is meant to be a record preservative, as in preserving the vinyl. I think, and correct me if I am wrong, but GruvGlide is not intended to protect the vinyl perse but, rather, acts as a lubricant and in reducing static (better solved with a Zerostat, IMHO). I recall the LAST making a claim that it molecularly binds to the vinyl where as the GruvGlide does not.
In this corner Groove Glide...
and the challenger is Last's record preservative. I have not tried gg, but there seems to be some discussion of a post cleaning step yea or nea. I use Last on all used records and nothing on new ones. Thus far happy with reduced noise and no back of the hall reduction in intimacy from those just cleaned but nothing extra. But I could be wrong. What say ye?