Can a Section 8 Tenant Midnight Break Lease Early?

[Jonathan R.]

Signed second year team in June for another year. Tenant called explaining they have bedbugs and roaches. I agreed when they renewed the lease I would be willing to spray for roaches if they would clean their house top to bottom. Lease says bugs are a tenant’s responsibility (though we do often assist). 

Anyway, I get no phone call till today, it is the tenant notifying me they are moving out.

Honestly, we’re fine if they vacate, seeing they are unwilling to clean their house, but can they just up and leave during a lease on a voucher? Thanks!