It's early spring and your sempervivums are looking a bit worse for wear after the long wet winter. What should you do?
You could do nothing, as the sempervivums will soon start bursting into growth again. But I'm never one for the lazy approach.
Removing any dead leaves around the base of the rosettes will make a visible difference, smartening then up. I'm good with my fingers, but tweezers really are best for this job. You can get them in underneath a rosette without causing any damage to the living leaves. I even use them to clean up your plants, if needed, before posting them. Tweezers are a great invention and tool!
Plants need food and sempervivums are no exception. Now, in early spring, is the best time. You'll need a liquid plant food with an NPK ration of 7:7:7 or similar. (Rose or tomato plant food isn't suitable as it would over-stimulate flowering.) Don't overdo it; a modest amount is best.