How do you reset roku remote?

if it keeps flashing and never pairs, it's nearly always the batteries. the pairing light still works on weak ones but the actual connection doesn't. fresh pair, then try again.

which remote though? the basic ones with no pairing button just run on infrared, so there's nothing to reset, swap the batteries and point it straight at the tv. if yours has a little button inside the battery compartment it's the wifi kind. take the batteries out, unplug the roku for a few seconds, plug it back in, wait for the home screen, put the batteries back and hold that button for about 5 seconds till the light flashes. it re-pairs on its own after that.