The phrase "always more sensitive" is correct and usable in written English.
It can be used to describe a consistent increase in sensitivity over time or in comparison to something else.
Example: "As we grow older, we often become always more sensitive to the emotions of those around us."
Alternatives: "consistently more sensitive" or "increasingly sensitive".
Real-time PCR was always more sensitive than conventional PCR assays.
The two countries expanded their cooperation on counternarcotics, but cooperation on migration was always more sensitive.
Thus, T7E1 was always more sensitive than Surveyor in our assays using deletion heteroduplex substrates.
Concerning auxin, the data presented here point out that the specificity of the response to the hormone is higher in ES and LM, although the relationship between the overall HORMONOMETER (H) and ST data indicates that mesocarp is always more sensitive than the seed to the hormone.
Rather like Jeremy Clarkson, Boris has always seemed more sensitive to taking banter than his love of dishing it out would imply.
I have always been more sensitive to the beauty of the world than to its violence and monsters.
Mount Vernon's state assemblyman, J. Gary Pretlow, says he thinks that Mount Vernon, given its large poor and working-class populations, has always been more sensitive to the prospect of displacing people to make way for grand projects.
Intro has always been more sensitive to the potentially creepy nature of ambient location apps, having previously introduced features that would allow users to switch of networking with those not outside of a set of preferred groups, for instance.
Thus, one cannot generalize that elderly individuals will always be more sensitive to the effects of hepatotoxicants.
For adriamycin (ADM), cells were always initially more sensitive when exposed to the drug in suspension rather than in intact spheroids.
I've always been, ahem, more sensitive to these things.
