Assume that tobacco smoking indoors is legal, but there is also a (legal) lease provision that smoking in the unit is against the lease and grounds for eviction.
Can a landlord legally enter the leased premises without notice to 'catch' or otherwise confront a tenant who is smoking against their lease if they smell tobacco smoke outside a unit?
Alternatively, can a landlord issue a blanket notice to all tenants that they will enter premises unannounced if, in the near future, they suspect a tenant is smoking?
I am in the US state of Wisconsin, but I'd also be interested in cases or more specific legislation elsewhere.
I have looked at guides for landlords and tenants, and although it seems clear that reasons for "emergency" entry are quite narrowly defined (i.e., there has to be some immediate risk to the property such as a current water leak), and smoke that may indicate a fire seems obviously included, I have so far been unable to find an answer on this specific question or similar situations involving suspicion of lease violations.
Certainly if a landlord suspects illegal activity, they could contact the police, but this is a situation where the suspected activity is merely against the lease. Additionally I am not asking whether a landlord can evict a tenant for smoking, since it is not necessary for a landlord to enter unannounced to observe smoking in a unit to evict.