diff --git a/include/scalfmm/interpolation/interpolator.hpp b/include/scalfmm/interpolation/interpolator.hpp
index 6ad49c74e8bc2043cb060368c6ae1876a63220f4..7fa810d0c693709efdd10699d8bdca169506f0e5 100644
--- a/include/scalfmm/interpolation/interpolator.hpp
+++ b/include/scalfmm/interpolation/interpolator.hpp
@@ -30,10 +30,10 @@
 #include "scalfmm/meta/traits.hpp"
 #include "scalfmm/meta/utils.hpp"
 #include "scalfmm/options/options.hpp"
+#include "scalfmm/utils/io_helpers.hpp"
 #include "scalfmm/utils/low_rank.hpp"
 #include "scalfmm/utils/math.hpp"
 #include "scalfmm/utils/tensor.hpp"
-#include "scalfmm/utils/io_helpers.hpp"
 
 using namespace scalfmm::io;
 
@@ -124,7 +124,7 @@ namespace scalfmm::interpolation
             /// @brief return the number of points in de dimension grid
             [[nodiscard]] inline auto nnodes() const noexcept { return m_nnodes; }
             /// @brief
-            [[nodiscard]] inline auto cell_width_extension() const noexcept -> value_type 
+            [[nodiscard]] inline auto cell_width_extension() const noexcept -> value_type
             {
                 return m_cell_width_extension;
             }
@@ -163,7 +163,7 @@ namespace scalfmm::interpolation
                 return this->derived_cast().derivative_impl(x, n);
             }
 
-            [[nodiscard]] inline auto grid_permutations() const -> grid_permutations_type  const&
+            [[nodiscard]] inline auto grid_permutations() const -> grid_permutations_type const&
             {
                 return m_grid_permutations;
             }
@@ -442,7 +442,6 @@ namespace scalfmm::interpolation
               , m_epsilon(std::pow(value_type(10.), -value_type(roots.size() - 1)))
               , m_cell_width_extension(cell_width_extension)
             {
-                std::cout << "roots.size()   " << roots.size() << std::endl;
                 if((cell_width_extension > 0) && (homogeneity_tag == matrix_kernels::homogeneity::homogenous))
                 {
                     throw std::runtime_error("Cell width extension is not yet supported for homogeneous kernels in the "