I am newly married and my husband and I take part in intimate activities almost every day and I know that Ghusl e janabat is wajib with washing hair and body. However due to my hair being long and very thick, I find it very difficult to wash it everyday as well as it being tied up under hijab all day and because of this I sometimes get into arguments with my husband to not be intimate as I am not able to wash my hair afterwards and do not want to have to miss prayers. Is there any way of avoiding washing my hair while doing Ghusl e janabat or is there a simplified method of doing Ghusl e janabat?

Ghusl only becomes wajib when you climax, and whoever climaxes. If you get intimate but you do not climax, then Ghusl will not be wajib. If only your husband climaxes then only he has to do Ghusl.

See ruling 345: