Do you clean your records before play, after play, or once (and then never again)?

I clean mine once on the VPI 16.5 then only a second time if they seem to still have issues when I play them. Otherwise I use a Furetech de-stat and a Carbon brush from acoustic sounds each time I play. I also clean the stylus frequently but not every side. I use the Lyra stylus cleaner but am re-using a Last Bottle and brush for convenience.

Never clean new records, all used ones go thru VPI16.5 once, if still bad then second spin on VPI with thorough scrubbing (yes I know that scrubbing does not do s#%*t but it makes me feel better about myself!) decides if LP stays or goes. Mapleshade grounded brush and Zerostat before each and every play. Still dreaming of ultrasonic cleaning machine but not going to buy it. 90+% of my listening is thru Naim CDS3 for CDs and Wadia 781 for SACDs, I am old and clinically lazy! Vinyl sounds sooo much better to my ears than digital that I am afraid to upgrade my TT or vinyl: it will spoil 90% of my listening sessions further still... 

I clean every record I buy (used or new) before first play. I clean the stylus before every play. I should probably clean the records more often, but mostly it is just one time. 

I use a Hunt brush before playing a record ..removes dust, but not peanut butter.   ....for that I use my Nitty Gritty, but it is usually not used much.

Once.
But I have a backlog of unwashed LPs, and if I want to hear one of those, I will play it regardless, if I can see no visual evidence of deposits on the surface.