What the old ones still looks like they had alot of life left on them... haha. good vid for true newbs that want to use hairspray and gas to put on.....
a good way to do it is with an air compressor and a needle for fillin up basketballs/footballs and such. just cut the old ones off and remove any old glue and sh*t. then just poke the needls through the end of the grip and slide it on while blasting air into it. slide on like butter and there is no need for glue or anything because its 2 perfectly dry surfaces.
if the end of the bars arent capped then cap the opposite side first with electrical tape. then once the first one is on, hold the other grip on (so it dont shoot off) and repeat for the other side.
if the bars are capped it takes about 30 seconds. if they arent capped it will take at most 2 minutes. AND THERES NO WAITING FOR DRYING!
i personally prefer to use 3m spray adhesive inside the grips.
It allows it to slide on then i rotate it a few times to spread the glue and allow it to sit over night and they never come off until you want them to.