I have a wheel-on smart trainer from Saris. Currently prior to each session I have to press its roller against the rear (training) tire by screwing in a special bolt - and then unscrew it after I'm done. In cold seasons I use the trainer on daily basis (sometimes more than once), so this process starts to irritate me quickly.

Can I just leave the roller constantly pressed against the tire? Will it shorten tire's lifespan, or may be damage the trainer itself somehow? Are there any known recommendations from tires or wheel-on trainers manufacturers on the subject? I wasn't able to find one from Saris, so far.