An auxiliary element (1) for the local deposition of fluid for a fluid dispenser header (10), includes a hollow main body (2), including a hollow conduit (3) inside the main body (2), configured such that the fluid flows through its interior, comprising an opening for the inlet of fluid (5) coming from the fluid dispenser header at one end, and a fluid outlet opening (6) at the opposite end, a cavity (4) located between the wall of the main body (2) and the hollow conduit (3), configured such that residual particles of the fluid flow through its interior, at least one connecting mean (8) to the interior of the hollow conduit (3) to the residual particles cavity (4) and an opening (7) located on the main body (2), configured for the outlet of residual particles from the cavity (4).