can't seem to make faucet turn from one sink to another and i don't know how to lubricate it?

There are three things that may make your faucet turn hard from side to side:

1. Stiff O-rings
2. Upper nut that holds cartridge in is too tight
3. Excessive calcification inside faucet body cavity

Turn water OFF, remove hand-held, hose, handle, remove cartridge. Lift outer body shell in up-ward pull and separate it from the rough body. Clean all visible calcification from the body and from the inside of the faucet shell. Replace O-rings with new ones, apply generous amount of lubricant, and reassemble. Make sure you don't clip new O-rings when sliding faucet shell over the rough body. When installing brass nut on top of the cartridge, tighten up only as much at it needs. Over tightening may make the body to turn hard, again

You will need some basic skill to do the O-ring replacement and lubrication. Also, you will need some basic tools to do the job

Hope that helps

Milo

Just had the same with a Delta single handle. Follow Milo's lead. Use plumbers grease. Typically takes about 20-30 minutes. To do everything. Be very careful with the O rings, they can be easily damaged/