Do I tip for the hair trial

I would.

You should always tip for services. that's how they make majority of their money.

I did.

Of course. They are still providing a service.

I offered a tip and mine wouldn't take it even though I insisted. Please try to tip them!

Yes definitely.

Following- didn't even think of this (but my trial isn't for a long time anyway!). How much did you guys tip? (as I normally tip a percentage when going to the salon.. but the cost of the trial is incorporated into the total price so not sure what 20% of the trial costs would be).

Yes. 150% yes.

Got it thanks everyone!