After ~2 years (and maybe four months of need) I finally replaced the pads on my daytime helmet†, a Giro Xar. I’ve been quite happy with this helmet, and it’s done well for me, but the soft pads inside were soundly compacted and some parts were starting to delaminate. This meant that there would be large lumps inside the helmet if I didn’t put it on very carefully.
At $4.99/set for the pads I should have done this a while ago. The replacement is as simple as pulling out the old pads and sticking the new ones to the velcro.
† At night I wear my old helmet, a Giro Phase. This one isn’t quite as comfortable as the Xar, so I keep a light mount on top and use it mostly at night. It’s also a backup in case something happens to the Xar.