Grout on my shower walls is falling out in places. Can I remove and re-grout without doing a bathroom remodel? And what king of grout would I use?

Hi RS

You sure can.

Purchase a cheap grout removal tool (see bottom image), or if you have a dremel or a multi. tool with a grout blade (see image) you can easily remove the grout and then clean and install new grout.

Any grout should do, but the best grout is an EPOXY GROUT such as spectralock grout (see image)...can't stain and should never have to worry about grout coming out or getting moldy as this stuff has a chemical reaction (and anti.microbial) that sets off and will not allow anything to adhere!

Mark