Lube treadmill deck

What do you use to lubricate your treadmill deck, belt?

I thought the treadmill doctor lube was good. What about silicone spray?

Thanks

The tech that recently serviced my Nordictrack treadmill used this:

https://www.amazon.com/Proform-Lifestyler-Treadmill-Lubricant-Manufacturer/dp/B06ZXTLGXB/ref=sr_1_31?crid=241RRZEBUPY61&keywords=treadmill+lubricant+nordictrack&qid=1583116311&sprefix=treadmill+lubricant+nor%2Caps%2C244&sr=8-31
.

Depends on the manufacture. You need to use what they recommend, a lot are silicon based. Most commercial OEM belts do not require any at all.