You need a good airflow around your work area to blow away the vapours, otherwise they linger and are attracted by moisture - open eyes. The vapours will rush straight into the eyes causing stinging and redness and watery eyes. Also make sure glue is seamless and thin glue line. Excess glue on the lash will take longer to cure and more vapours will be present. Plus if you use an activator after the lashes are complete the adhesive will be cured off in less than 30 minutes, not the usual 24 hours, resulting in less sensitivities. Retention Plus by Optimum is an activator applied to the glue bonds after the full set is complete optimumlashglue .co.uk