I think a bidet is the best answer, but in its absence, I keep a small plastic bottle in the bathroom that I fill with lukewarm water from the washbasin, and use to rinse myself after going to the toilet in the morning, first behind then in front, but I am lucky to have a small bathroom in which the sink is next to the toilet. And it does make the seat wet and requires a certain amount of dexterity ( but not as much as jumping up and down in the shower). And yes, panty liners are useful if you have a bad cough or weak muscles, just a few drops could leave a damp patch on a friend's sofa. This is the reality of growing old for some people.