diff --git a/R/fortify.R b/R/fortify.R
index 54f01c0..dc8a898 100644
--- a/R/fortify.R
+++ b/R/fortify.R
@@ -45,38 +45,3 @@ fortify.periodic_df <- function(model, data, ...) {
   }
 }
 
-
-#' #' @importFrom ggplot2 ggplot_add
-#' #' @export
-#' ggplot_add.periodic_layer <- function(object, plot, object_name) {
-#'   gr <- as.character(object$layer$mapping$group)[2]
-#'   if (!is.null(object$layer$data) & !is.waive(object$layer$data)) {
-#'     # If data is defined for this layer
-#'     if (!is.periodic(object$layer$data)) {
-#'       object$layer$data <- do.call(periodic, c(list(object = object$layer$data),
-#'                                                object$cols))
-#'     }
-#'     if (is.periodic(object$layer$data)) {
-#'       object$layer$data <- do.call(wrap, c(list(object = object$layer$data,
-#'                                                 .group = gr),
-#'                                            object$cols))
-#'     }
-#'
-#'   } else {
-#'     # If data comes from plot
-#'     if (!is.periodic(plot$data)) {
-#'       if (!isTRUE(attr(plot$data, "wrapped"))) {
-#'         # If is not a wrapped periodic dataframe
-#'         object$layer$data <- do.call(periodic, c(list(object = plot$data), object$cols))
-#'       }
-#'     }
-#'     if (is.periodic(object$layer$data)) {
-#'       object$layer$data <- do.call(wrap, c(list(object = object$layer$data,
-#'                                                 .group = gr),
-#'                                            object$cols))
-#'     }
-#'   }
-#'
-#'   plot$layers <- append(plot$layers, object$layer)
-#'   plot
-#' }
\ No newline at end of file
diff --git a/R/periodic.R b/R/periodic.R
index 7f6736e..5930a88 100644
--- a/R/periodic.R
+++ b/R/periodic.R
@@ -99,7 +99,6 @@ periodic.data.frame <- function(object, ...) {
       data.table::setattr(object[[names(cols)[i]]], "period", period)
       if (!inherits(object[[names(cols)[i]]], "sticky")) {
         data.table::setattr(object[[names(cols)[i]]], "class", c("sticky", class(object[[names(cols)[i]]])))
-        # class(object[[names(cols)[i]]]) <- c("sticky", class(object[[names(cols)[i]]]))
       }
     }
   }