Removing Shellac from very dry nails?


Could anyone advise me please on how to make nails smooth before applying Shellac. At the moment my own nails are really dry, could this make removing Shellac more difficult? It takes ages trying to get it off and they are left with delamination and so dry. At the moment I apply solar oil at least 3 times daily and try to leave them bare for a couple of days between manicures. I file them to try and smooth them, but is there anything else I could do? Thankyou