I will let others respond directly to your actual question. My input regards some issues you may be able to correct without the aid of liners.

First, the age of your tires. Are they still relatively new or somewhat worn. As tires wear out they are much more susceptible to punctures.

Also are any of these punctures repeats in the same place on the same tire and tube suggesting embedded road debris that you have not removed?

Finally are the punctures facing the road, the tire bead, or the spokes. Each type has one or more different standard causes. If facing the road, then the usual cause is road debris like stones, glass, tacks, etc. The liner would help with that. If facing the tire bead, then the usual cause is pinching due to under inflation (often seen as a double or snake-bite puncture). If facing the rim bed, there are several possible causes like protruding spokes, insufficient coverage of the spoke holes, etc.

Knowing which kinds of flats you are getting is important to choosing and applying a solution to the problem.