Puppies should be taken outside or to the paper just before bedtime. They should then be put in the crate and must remain there until the next morning, or when you return home. They will probably mess up for the first few nights, but they will soon learn that they have to stay in the soiled environment until morning, if they have an accident. The crate should be plastic so that it is easily washed. Later, if you move or travel by air, the crate will make an airline trip less traumatic, since this is the pup's usual bed.
Crates are available at the clinic at a reasonable cost.
For cleaning accidents, use an odor neutralizer recommended by your veterinarian. Most household cleaners contain ammonia, which is also found in urine - and therefore only confuses the puppy. In our opinion, it is wrong to discipline the pup for an accident in the house, except when you catch the pup in the act. Punishment often causes undesirable personality traits to develop.