You don’t. If you “get more conservative” you always were a conservative.
My parents are in the 80’s and are as liberal as they always have been. Partner and I are as liberal as we were in our 20’s (I’m actually more socialist than I was—and I was pretty socialist then).
If you look at the breakdown, boomers and older vote ALMOST IDENTICALLY to Gen X (Pew).
We didn’t get Trump because of the “Olds”, who are 48% of the electorate, we for him because of the “Young’s.”