Please keep the base in the bathroom and use it.

I keep everything from toner to cream in the bathroom for use.

If the placement location is ambiguous and unsuitable

Try keeping at least the toner in the bathroom and using it.

It doesn't take long from showering to drying off, towel-drying my hair, and coming out.

They say all the moisture evaporates in that time.

If you apply toner thoroughly first before moisture is lost, you can maintain hydration.