Steering rack boots- condition or not

[omodos]

Hello to all, 15 year old x, seen most of its life in a hot climate, just had the steering rack boots replaced, old ones seemed a bit crumbly and dry and made out of a harder rigid plastic rubber than the cv boots, same goes for the new ones. Is there any point in trying to condition the new ones ? And with what ? Liquid silicone? Cv boots i did seem nice and supple and clean, but these rack boots are rigid, not sure should touch em.