We design our blocks so that they are easy to clean. They are pre-split, but held together with UV resistant bands so that they are tightly sealed.
The need to clean them mostly comes from the agricultural sector though, and isn't required for small habitats with only a handful of nesting sites. My partner is a wild bee researcher, and they've been using these in the field for about 60 years. As long as the density is low, the requirement for cleaning them is optional.
The need to clean them mostly comes from the agricultural sector though, and isn't required for small habitats with only a handful of nesting sites. My partner is a wild bee researcher, and they've been using these in the field for about 60 years. As long as the density is low, the requirement for cleaning them is optional.