South Dakota Lease breaker?

[Kelly Arganbright]

My friends recent signed a lease for an apartment, then discovered that it was infested with cockroaches. The landlord never mentioned them before they signed, and has done next to nothing to deal with them. Apparently he left fumigation bombs there but didn’t use them, so my friends are going to have to bomb the apartment. He also never actually notified them that he left them there (they have not yet moved in) there is also 2 other apartments in the unit, so bombing the 1 wouldn’t solve the infestation entirely. Can my friends get out of the lease?