Use a Vacuum:-
A wet /dry vacuum helps in cleaning the liquids, dust, and dirt from the sewer. Before starting, create a seal over the hole. This seal would be helpful in not making a mess around the place. Then turn the vacuum on to liquid mode and place it over the hole. After some time, switch off the vacuum to check result if the water has flown away. If not, then hire Professional Drains Clean in Houston TX they will help you out.
Article source: https://www.kangblogger.com/5-ways-to-keep-your-drains-clean-in-houston-tx/