"I've been wearing monthly lenses for over a year now." does this mean you've been wearing one pair of monthly contacts for over a year or in over a year you've being wearing monthly lenses (change every month)? If it is the former, I strongly suggest you do not let them in your eyes again. It is very bad for you as the overdue contact lenses have worse oxygen permeability, and this makes your eyes easy to infect. 30 day contact lenses are the kind of contacts should be threw them in 30 days after you wear them from the first time, the same as monthly lenses. If you don't wear them often, you can have them more than one week, but never too long. The badness I present above, right?