On Mon, 18 Mar 2019 21:22:39 -0700, Bob F wrote:

On 3/18/2019 12:57 PM, wrote:
What are the best lubricants (not WD40) that sliding windows and patio doors?


Wax? Rub the sliding surfaces with a candle.
That's why I asked what kind of window. Soap works great on wooden
windows. So does wax. Neither work well on vinyl (at least not candle
wax) A good caraubu auto wax can work well on vinyl.