Pull out the appliances and check the vent pipe. It's probably clogged with lint. Get yourself a vent snake and a shop vac and clean that baby out.

https://www.amazon.com/Holikme-Cleaning-Remover-Fireplace-Synthetic/dp/B07SQYX2FH/

https://www.amazon.com/dp/B07SQYX2FH/ref=cm_sw_r_cp_apa_fabc_xzwbGb1T3S21S?_encoding=UTF8&psc=1