When I did Pax I used things like ice, frozen peas and ice lollies with an ice box, ones you get from camping type shops and the chemo gloves and socks, just searching on Amazon saying that. Always say to your team quickly if you get neuropathy or any symptoms so they can adjust things, neuropathy can be permanent if not controlled properly but if team know should be able to minimise risk of that. 2 years out mine is minimal, I have slight tingling in ends of fingers, part of face and numbness around wrists but nothing that interferes with anything.
The ice lollies meant no mouth issues at all, and taste normal, well worth also seeing a dentist pre chemo, which may well need to be private given the state of NHS dentistry and they can prescribe high fluoride toothpaste and things to help if get any mouth issues. Probably still worth doing in chemo if not done already but ideal time is to go before, also get any fillings or work done, chemo and radiotherapy can be both rough on teeth as is Tamoxifen and I have had all 3 but teeth have been fine. Very important mouth doesn't get too dry my dentist said, I never had issues but dentist can prescribe something if do, think it's something like saliva replacement, sounded lovely.
Not sure if nails will be neuropathy or something else but say to team, I do think the ice or similar, there's frozen gel packs you can get from Amazon would help future damage. Basically the cold reduces chemo to that area I think. Some people use nail varnish but I didn't and nails are perfect and it seemed to split opinion if it helped.
I also found generally drinking a lot pre chemo day on the day and eating a bit before helped and with eating generally little and often was easier for me than meals and I tried to get iron rich foods though it will vary by person.